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  • 1. Agui, Akane
    et al.
    Butorin, Sergei
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Käämbre, Tanel
    Såthe, Conny
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Saitoh, T
    Moritomo, Y
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Resonant Mn L emission spectra of layered manganite La1.2Sr1.8Mn2O72005In: Journal of the Physical Society of Japan, Vol. 74, no 6, p. 1772-1776Article in journal (Refereed)
  • 2. Agui, Akane
    et al.
    Käämbre, Tanel
    Såthe, Conny
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Usada, M
    Saitoh, T
    Moritomo, Y
    Resonant OK alpha emission spectroscopy of layered manganate La1.2Sr1.8Mn2O72005In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 144, p. 589-592Article in journal (Refereed)
  • 3.
    Augustsson, A
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics I.
    Henningsson, A
    Butorin, S
    Department of Physics and Materials Science, Physics II. Physics I.
    Siegbahn, H
    Department of Physics and Materials Science, Physics II. Physics I.
    Nordgren, J
    Department of Physics and Materials Science, Physics II. Physics I.
    Guo, J H
    Lithium ion insertion in nanoporous anatase Ti02 studied with RIXS2003In: Journal of Chemical Physics, Vol. 119, no 7, p. 3983-3987Article in journal (Refereed)
  • 4.
    Augustsson, A
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II.
    Schmitt, T
    Duda, L
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II.
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II.
    Nordlinder, Sara
    Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II. strukturkemi.
    Edström, Kristina
    Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II. strukturkemi.
    Gustafsson, Torbjörn
    Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II. strukturkemi.
    Guo, J H
    The electronic structure and lithiation of electrodes based on vanadium-oxide nanotubes2003In: Journal of Applied Physics, Vol. 94, no 8, p. 5083-5087Article in journal (Refereed)
    Abstract [en]

    The synthesis of a novel ligand 2′-[1-(2-pyridinyl)-ethylidene]-oxamohydrazide (Hapsox), from a series of 2-acetylpyridine acylhydrazones, and its complex with Co(III), which is the first in this series of complexes are described. Both the ligand and the complex were characterized by elemental analysis, IR, 1H-NMR, and 13C-NMR spectra, and the structure of the complex [Co(apsox)2]ClO4 was determined by X-ray structural analysis. It was established that [Co(apsox)2]ClO4 has an octahedral geometry with two tridentate apsox ligands in monoanionic form. Structural characteristics, lengths of the bonds, and angles between the bonds were typical for Co(III) complexes of distorted octahedral geometry. Both direct and template synthesis afforded the same geometrical isomer of the complex with two apsox ligands meridionally bound to the central metal ion, even in the case when equimolar quantities of Co(ClO4)2 and Hapsox were applied.

  • 5.
    Augustsson, Andreas
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Zhuang, G V
    Butorin, Sergei
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Osorio-Guillén, J M
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Dong, C L
    Ahuja, Rajeev
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Chang, C L
    Ross, P N
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Guo, Jinghua
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Electronic structure of phospho-olivines LixFePO4 (x=0,1) from soft-x-ray-absorption and -emission spectroscopies2005In: Journal of Chemical Physics, Vol. 123, no 18Article in journal (Refereed)
  • 6. Bliman, S
    et al.
    Bruch, R
    Cornille, M
    Langereis, A
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Case study of the Ar9+-He collision system at low velocity2002In: Physical Review A, Vol. 66, no 5Article in journal (Refereed)
  • 7.
    Brena, Barbara
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Zhuang, G V
    Augustsson, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Liu, G
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Guo, Jinghua
    Ross, P N
    Luo, Yi
    Conformation dependence of electronic structures of poly(ethylene oxide)2005In: Journal of Physical Chemistry B, Vol. 109, no 16, p. 7907-7914Article in journal (Refereed)
  • 8.
    Butorin, S
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Såthe, C
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Saleem, F
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Zhu, X M
    Probing the Mn3+ sublattice in La0.5Ca0.5MnO3 by resonant inelastic soft X-ray scattering at the Mn L-2,L-3 edge2002In: Surface Review and Letters, Vol. 9, no 2, p. 989-992Article in journal (Refereed)
  • 9.
    Butorin, Sergei M.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Shuh, David K.
    Kvashnina, Kristina O.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Guo, Jinghua
    Werme, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Chemical Reduction of Actinides Probed by Resonant Inelastic X-ray Scattering2013In: Analytical Chemistry, ISSN 0003-2700, E-ISSN 1520-6882, Vol. 85, no 23, p. 11196-11200Article in journal (Refereed)
    Abstract [en]

    The study addresses the possibilities of immobilizing the mobile species of actinides in the geosphere using metallic iron. Sorption on corroding iron is well-known, but there have been uncertainties with regard to the possibilities of reducing the actinyl species to sparingly soluble oxides and, thereby, permanently immobilizing them. Resonant inelastic X-ray scattering (RIXS) measurements at the actinide 5d edges on Fe foils exposed to uranium(VI) and neptunium(V) solutions in groundwater unambigiously indicate reduction of actinides to, respectively, uranium(IV) and neptunium(IV) on iron surfaces. The reduction manifests itself in an appearance of distinct specific signatures of uranium(IV) and neptunium(IV) in the RIXS profile of 5f-5f excitations. Such signatures and RIXS intensity/cross-section behavior with varying energy of incident photons can be reproduced by model atomic-multiplet calculations of the RIXS spectra. By normalizing the RIXS signal of corresponding 5f-5f excitations to core-to-core 6p-to-5d characteristic fluorescence transitions of actinides, their reduction rates on Fe samples with different exposure to actinide solutions can be estimated. Observed reduction implies similar processes in the nuclear waste canister thus suggesting reduced probability of nuclear waste release with ground waters from the canister.

  • 10.
    Butorin, Sergei
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Såthe, Conny
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Agui, Akane
    Saleem, Fouzia
    Alonso, J A
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Intra-versus inter-site electronic excitations in NdNiO3 by resonant inelastic ultra-soft X-ray scattering at Ni 3p edge2005In: Solid State Communications, Vol. 135, no 11-12, p. 716-720Article in journal (Refereed)
  • 11. Butorin, SM
    et al.
    Guo, JH
    Magnuson, Martin
    Uppsala University.
    Kuiper, P
    Nordgren, J
    Uppsala University.
    Low-energy d-d excitations in MnO studied by resonant x-ray fluorescence spectroscopy1996In: PHYSICAL REVIEW B-CONDENSED MATTER, ISSN 0163-1829, Vol. 54, no 7, p. 4405-4408Article in journal (Other scientific)
    Abstract [en]

    We measured the Mn L(alpha,beta) x-ray fluorescence spectra of MnO excited by selected photon energies near the L(2,3) absorption edges. The resulting resonant inelastic x-ray scattering spectra probe low-lying electronic excited states, due to dd and cha

  • 12. Butorin, SM
    et al.
    Guo, JH
    Magnuson, Martin
    Uppsala University.
    Nordgren, J
    Uppsala University.
    Resonant inelastic soft-x-ray scattering from valence-band excitations in 3d(0) compounds1997In: PHYSICAL REVIEW B-CONDENSED MATTER, ISSN 0163-1829, Vol. 55, no 7, p. 4242-4249Article in journal (Other scientific)
    Abstract [en]

    Ti and Mn L(alpha,beta) x-ray fluorescence spectra of FeTiO3 and KMnO4 were measured with monochromatic photon excitation on selected energies across the L(2,3) absorption edges. The resulting inelastic x-ray-scattering structures and their changes with v

  • 13. Butorin, SM
    et al.
    Magnuson, Martin
    Uppsala University.
    Ivanov, K
    Shuh, DK
    Takahashi, T
    Kunii, S
    Guo, JH
    Nordgren, J
    Uppsala University.
    Resonant inelastic soft-X-ray scattering at the 4d edge of Ce-based heavy-fermion materials1999In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, ISSN 0368-2048, Vol. 103, p. 783-786Article in journal (Other scientific)
    Abstract [en]

    Resonant X-ray scattering measurements were performed on CeB6, CeAl, gamma-Ce, and alpha-Ce at various incident-photon energies near the Ce 4d threshold. A pronounced inelastic scattering structure which has 4f character is observed at about 4 eV below th

  • 14.
    Duda, L
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Schmitt, T
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Dhalenne, G
    Revcolevschi, A
    Resonant inelastic soft X-ray scattering of insulating cuprates2002In: Surface Review and Letters, Vol. 9, no 2, p. 1103-1108Article in journal (Refereed)
  • 15.
    Duda, Laurent C.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Schmitt, Torsten
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Magnuson, Martin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Forsberg, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Olsson, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Okada, K.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Kotani, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Reply to comment by Hüfner on "Resonant Inelastic X-Ray Scattering at the Oxygen K Resonance of NiO: Nonlocal Charge Transfer and Double-Singlet Excitations"2006In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 97, no 269702Article in journal (Other academic)
  • 16.
    Duda, Laurent
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Schmitt, Thorsten
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Augustsson, Andreas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Resonant soft X-ray emission of solids and liquids2004In: Journal of Alloys and Compounds, Vol. 362, no 1-2, p. 116-123Article in journal (Refereed)
  • 17.
    Duda, Laurent
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Schmitt, Thorsten
    Magnuson, Martin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Forsberg, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Soft X-Ray Physics.
    Olsson, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Okada, K
    Kotani, A
    Resonant inelastic x-ray scattering at the NiO O K-resonance: non-local charge-transfer and double singlet excitations2006In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 96, no 6, p. 067402-Article in journal (Refereed)
  • 18.
    Duda, Laurent
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Schmitt, Thorsten
    Magnuson, Martin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Forsberg, Johan
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Olsson, Anders
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Okada, K
    Kotani, A
    Resonant inelastic x-ray scattering at the oxygen K resonance of NiO: Nonlocal charge transfer and double-singlet excitations2006In: Physical Review Letters, Vol. 96, no 6Article in journal (Refereed)
  • 19.
    Duda, Laurent
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Schmitt, Thorsten
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Kuiper, Pieter
    Dhalenne, G
    Revcolevschi, A
    Low-energy excitations in resonant inelastic x-ray scattering of alpha(')-NaV2O52004In: Physical Review Letters, Vol. 93, no 169701Article in journal (Refereed)
  • 20.
    Duda, Laurent
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Schmitt, Thorsten
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Kuiper, Pieter
    Dhalenne, Guy
    Revscolevschi, Alexandre
    Low-energy excitations in resonant inelastic X-ray scattering of α' - NaV2O52004In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 15, no 93, p. 169701-Article in journal (Refereed)
  • 21.
    Englund, Carl-Johan
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Agåker, Marcus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Fredriksson, Pierre
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Olsson, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Johansson, Niklas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    An ultra-high vacuum chamber for scattering experiments featuring in-vacuum continuous in-plane variation of the angle between entrance and exit vacuum ports2015In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 86, no 9, article id 095110Article in journal (Refereed)
    Abstract [en]

    A concept that enables in-vacuum continuous variation of the angle between two ports in one plane has been developed and implemented. The vacuum chamber allows for measuring scattering cross sections as a function of scattering angle and is intended for resonant inelastic X-ray scattering experiments. The angle between the ports can be varied in the range of 30 degrees-150 degrees, while the pressure change is less than 2 x 10(-10) mbars.

  • 22. Finkelstein, L D
    et al.
    Zabolotzky, E I
    Korotin, M A
    Shamin, S N
    Butorin, S
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Fysik II.
    Kurmaev, E Z
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Vacant states of TiO2 with rutile structure and their reflection in different-type x-ray absorption spectra2002In: X-Ray Spectrometry, Vol. 31, no 6, p. 414-418Article in journal (Refereed)
  • 23. Galakhov, A V
    et al.
    Galakhov, V R
    Anisimov, V I
    Kurmaev, E Z
    Sokolov, A V
    Gridneva, L
    Maltsev, V V
    Leonyuk, L I
    Moewes, A
    Bartkowski, S
    Neumann, M
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Influence of the Coulomb parameter U on partial densities of states of CuGeO3: Comparison with X-ray spectral data2004In: European Physical Journal B, Vol. 41, no 3, p. 295-300Article in journal (Refereed)
  • 24. Galakhov, V. R.
    et al.
    Ovechkina, N. A.
    Shkvarin, A. S.
    Shamin, S. N.
    Kurmaev, E. Z.
    Kuepper, K.
    Takacs, A. F.
    Raekers, M.
    Robin, S.
    Neumann, M.
    Gavrila, G. N.
    Semenova, A. S.
    Kellerman, D. G.
    Käämbre, Tanel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Electronic structure and x-ray spectra of defective oxides LixCoO22006In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 74, no 4, p. 045120-Article in journal (Refereed)
    Abstract [en]

    X-ray absorption, resonant x-ray emission, and x-ray photoelectron spectra of the valence band and core levels have been measured for LixCoO2 (0.6 <= x <= 1.0). Resonant O K alpha x-ray emission spectra of LiCoO2 showed localized excitonic states due to a dd transition between unoccupied and occupied Co 3d states. On the basis of measurements of Co 3s x-ray photoelectron and Co 2p and O 1s x-ray absorption spectra it was established that in defective cobaltites the electronic holes are localized mainly in O 2p states. Evidence of phase separation in LixCoO2 has been found.

  • 25. Galakhov, V R
    et al.
    Surkova, T P
    Yablonskikh, M V
    Sokolov, Av
    Kurmaev, E Z
    Gridneva, L
    Bartkowski, S
    Neumann, M
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Co 3d-level position in ZnS : Co semiconductors2003In: Physical Review B, Vol. 68, no 3Article in journal (Refereed)
  • 26.
    Gråsjö, Johan
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Andersson, Egil
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Forsberg, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Aziz, Emad
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Brena, Barbara
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Johansson, Christian
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Duda, Laurent
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Hansson, Per
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Oxygen K-edge studies of water poor surfactant gel systems2008Conference paper (Other (popular science, discussion, etc.))
  • 27.
    Guo, J H
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Lou, Y
    Augustsson, A
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Kashtanov, S
    Rubensson, J E
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Shuh, D K
    Ågren, H
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Molecular structure of alcohol-water mixtures2003In: Physical Review Letters, Vol. 91, no 15Article in journal (Refereed)
  • 28.
    Guo, J H
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Luo, Yi
    Augustsson, A
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics I.
    Rubensson, J E
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics I.
    Såthe, C
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics I.
    Ågren, H
    Siegbahn, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics I.
    Nordgren, J
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics I.
    X-ray emission spectroscopy of hydrogen bonding and electronic structure of liquid water2005In: Physical Review Letters, Vol. 89, no 13Article in journal (Refereed)
  • 29.
    Guo, J H
    et al.
    Fysik II.
    Vayssieres, L
    Persson, C
    Ahuja, R
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV. Fysik IV.
    Johansson, B
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV. Fysik IV.
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV. Fysik II.
    Polarization-dependent soft-x-ray absorption of highly oriented ZnO microrod arrays2002In: Journal of Physics-Condensed Matter, Vol. 14, no 28, p. 6969-6974Article in journal (Refereed)
  • 30. Guo, JH
    et al.
    Magnuson, Martin
    Uppsala University.
    Sathe, C
    Uppsala University.
    Nordgren, J
    Uppsala University.
    Yang, L
    Luo, Y
    Agren, H
    Xing, KZ
    Johansson, N
    Salaneck, WR
    Daik, R
    Feast, WJ
    Resonant and nonresonant x-ray scattering spectra of some poly(phenylenevinylene)s1998In: JOURNAL OF CHEMICAL PHYSICS, ISSN 0021-9606, Vol. 108, no 14, p. 5990-5996Article in journal (Other scientific)
    Abstract [en]

    The electronic structure of some poly(phenylenevinylene)s have been investigated by resonant and nonresonant x-ray inelastic scattering spectroscopies. The nonresonant as well as all resonant spectra for each polymer demonstrate benzene-like features, ind

  • 31. Guo, Jinghua
    et al.
    Augustsson, Andreas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II.
    Kashtanov, S
    Spångberg, Daniel
    Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II. strukturkemi.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II.
    Hermansson, Kersti
    Chemistry, Department of Materials Chemistry, Structural Chemistry. Department of Physics and Materials Science, Physics II. strukturkemi.
    Luo, Yi
    The interaction of cations and liquid water studied by resonant soft-X-ray absorption and emission spectroscopy2005In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 144-147, p. 287-290Article in journal (Refereed)
    Abstract [en]

    We report the soft-X-ray absorption and emission studies of NaCl, MgCl2, and AlCl3 in water solutions. The influences of cations on the water molecular structure can be seen as the absorption threshold edge shifted to high energy in the X-ray absorption spectra; the mixing of molecular orbital in 3a1 symmetry is reinforced as the intensity of 3a1 is further reduced; and the 1b1-emission peak shows the broadening and shift differently for Na+, Mg2+, and Al3+ water solutions, which indicates that the charge difference of the cations may not be the only playing role being responsible to the interactions between the cations and water molecules.

  • 32. Guo, Jinghua
    et al.
    Luo, Yi
    Augustsson, Andreas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Kashtanov, S
    Rubensson, Jan-Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Shuh, D
    Zhuang, V
    Ross, P
    Ågren, Hans
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    The molecular structure of alcohol-water mixtures determined by soft-X-ray absorption and emission spectroscopy2004In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 137-40, no SI, p. 425-428Article in journal (Refereed)
  • 33. Guo, Jinghua
    et al.
    Vayssieres, L
    Persson, C
    Ahuja, Rajeev
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics IV. Physics II.
    Johansson, Börje
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics IV. Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics IV. Physics II.
    Polarization-dependent soft-x-ray absorption of a highly oriented ZnO microrod-array2005In: Journal of Physics-Condensed Matter, ISSN 1361-648X, Vol. 17, no 1, p. 235-240Article in journal (Refereed)
    Abstract [en]

    We report the soft-X-ray absorption and emission studies of NaCl, MgCl2, and AlCl3 in water solutions. The influences of cations on the water molecular structure can be seen as the absorption threshold edge shifted to high energy in the X-ray absorption spectra; the mixing of molecular orbital in 3a1 symmetry is reinforced as the intensity of 3a1 is further reduced; and the 1b1-emission peak shows the broadening and shift differently for Na+, Mg2+, and Al3+ water solutions, which indicates that the charge difference of the cations may not be the only playing role being responsible to the interactions between the cations and water molecules.

  • 34. Hellgren, N
    et al.
    Guo, Jinghua
    Luo, Yi
    Såthe, Conny
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Agui, Akane
    Kashtanov, S
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Ågren, Hans
    Sundgren, J E
    Electronic structure of carbon nitride thin films studied by X-ray spectroscopy techniques2005In: Thin Solid Films, Vol. 471, no 1-2, p. 19-34Article in journal (Refereed)
  • 35.
    Hjorvarsson, B
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Guo, JH
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Ahuja, R
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Ward, RCC
    Andersson, G
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Eriksson, O
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Wells, MR
    Sathe, C
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Agui, A
    Butorin, SM
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Probing the local electronic structure in the H induced metal-insulator transition of Y1999In: JOURNAL OF PHYSICS-CONDENSED MATTER, Vol. 11, p. L119-Article in journal (Refereed)
    Abstract [en]

    The occupied acid unoccupied valence band states of yttrium (Y) metal, Y dihydride and Y trihydride were measured by soft x-ray emission and absorption spectroscopy. The experiments were complemented by first principles calculations. Both experiments and

  • 36. Kashtanov, S
    et al.
    Augustsson, Andreas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics I. Physics II.
    Luo, Yi
    Guo, J H
    Såthe, Conny
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics I. Physics II.
    Rubensson, Jan-Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics I. Physics II.
    Siegbahn, Hans
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics I. Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics I. Physics II.
    Ågren, Hans
    Local structures of liquid water studied by x-ray emission spectroscopy2004In: Physical Review B, Vol. 69, no 2Article in journal (Refereed)
  • 37. Kashtanov, S
    et al.
    Augustsson, Andreas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Rubensson, Jan-Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Ågren, Hans
    Guo, Jinghua
    Luo, Yi
    Chemical and electronic structures of liquid methanol from x-ray emission spectroscopy and density functional theory2005In: Physical Review B, Vol. 71, no 10Article in journal (Refereed)
  • 38. Kjeldgaard, Lisbeth
    et al.
    Käämbre, Tanel
    Schiessling, Joachim
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics V. Physics II.
    Marenne, J.
    O´Shea, J. N.
    Schnadt, Joachim
    Glover, C. J.
    Nagasono, M.
    Nordlund, Dennis
    Garnier, M. G.
    Qian, Limin
    Rubensson, Jan-Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics V. Physics II.
    Rudolf, P.
    Mårtensson, Nils
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics V. Physics II.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics V. Physics II.
    Brühwiler, Paul
    Department of Physics and Materials Science, Physics V. Physics II.
    Intramolecular vibronic dynamics in molecular solids: C-602005In: Physical Review B, Vol. 72, no 20, p. 205414-15Article in journal (Refereed)
  • 39. Kurmaev, E Z
    et al.
    Moewes, A
    Butorin, S
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Katsnelson, M I
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Finkelstein, L D
    Nordgren, J
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics IV.
    Tedrow, P M
    Half-metallic electronic structure of CrO2 in resonant scattering2003In: Physical Review B, Vol. 67, no 15, p. 155105-Article in journal (Refereed)
  • 40.
    Kurmaev, EZ
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
    Katsnelson, MI
    Moewes, A
    Magnuson, Martin
    Guo, JH
    Butorin, SM
    Nordgren, J
    Ederer, DL
    Iwami, M
    Spectroscopic observation of polaron-lattice band structure in the conducting polymer polyaniline2001In: JOURNAL OF PHYSICS-CONDENSED MATTER, ISSN 0953-8984, Vol. 13, no 17, p. 3907-3912 Language: EnglishArticle in journal (Refereed)
    Abstract [en]

    We present the results of soft x-ray emission measurements for undoped and protonated polyemeraldine. We show that the polaron-lattice band structure fully accounts for the observed x-ray transitions. A finite spectral intensity of C K alpha and N K alpha

  • 41. Kuznetsova, T V
    et al.
    Yablonskikh, M V
    Postnikov, A V
    Nicolay, G
    Eltner, B
    Reinert, F
    Yarmoshenko, Y M
    Titov, A N
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II.
    Electron structure of 1T-TiTe2 intercalated with Cr based on ARPES, RXES and XAS data2004In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 137-40, no SI, p. 481-485Article in journal (Refereed)
  • 42.
    Kvashnina, Kristina
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Butorin, Sergei
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Modin, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Soroka, Inna
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Marcellini, Moreno
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Guo, Jinghua
    Werme, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Changes in electronic structure of copper films in aqueous solutions2007In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 19, no 22, p. 226002-Article in journal (Refereed)
    Abstract [en]

    The possibilities for using x-ray absorption spectroscopy (XAS) and resonant inelastic x-ray scattering (RIXS) to probe the Cu oxidation state and changes in the electronic structure during interaction between copper and ground-water solutions were examined. Surface modifications induced by chemical reactions of oxidized 100 Å Cu films with Cl, SO42− and HCO3 ions in aqueous solutions with various concentrations were studied in situ using liquid cells. Copper corrosion processes in ground water were monitored for up to nine days. By comparing Cu 2p–3d, 4s transitions for a number of reference substances previously measured, changes in electronic structure of the Cu films were analysed. The XAS and RIXS spectral shape at the Cu edge, the chemical shift of the main line for Cu2+, and the energy positions of the observed satellites served as a tool for monitoring the changes during the reaction. It was found that the pH value and the Cl concentration in solutions strongly affect the speed of the corrosion reaction.

  • 43.
    Kvashnina, Kristina
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics III.
    Butorin, Sergei
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics III.
    Nordgren, Joseph
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics III.
    Guo, Jinghua
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics III.
    Hjörvarsson, Björgvin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics. Department of Physics and Materials Science, Physics II. Physics III.
    Electronic structure of Gd hydrides studied by resonant Inelastic soft X-ray scattering2004In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 137-140, p. 487-489Article in journal (Refereed)
  • 44.
    Käämbre, Tanel
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Schiessling, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics V.
    Kjeldgaard, Lisbeth
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics V.
    Qian, Limin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Marenne, I.
    O´Shea, James N.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics V.
    Schnadt, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics V.
    Nordlund, Dennis
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics V.
    Glover, C. J.
    Rubensson, Jan-Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Rudolf, P.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics V.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Brühwiler, Paul A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics V.
    Bulk electronic structure of K3C60 as revealed by soft x-rays2007In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 75, no 19, p. 195432-Article in journal (Refereed)
    Abstract [en]

    We present C 1s x- ray absorption, x- ray emission, and resonant inelastic x- ray scattering (RIXS ) spectra of single- phase crystalline K3C60. The comparison to valence- band photoelectron spectra from the same sample facilitates identification of the contribution from surface and bulk electronic states in the latter. Bulk- sensitive techniques show that the valence bands of K3C60 and pure C-60 are characterized by spectral features of similar width, in agreement with the predictions of band- structure calculations. Symmetry selectivity in the RIXS process allows us to assign peaks in the C 1s absorption spectrum, demonstrating a close correspondence with pure C-60 also in the conduction band. The symmetry selectivity is as pronounced in K3C60 as in pure C-60, indicating that the local C-60 symmetry is not appreciably affected by the K doping, either in the ground state or intermediate state, on the time scale of 6 fs.

  • 45. Liu, H J
    et al.
    Guo, J H
    Yin, Y D
    Augustsson, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science, Soft X-Ray Physics.
    Dong, C L
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science, Soft X-Ray Physics.
    Chang, C L
    Alivisatos, P
    Thornton, G
    Ogletree, D G
    Requejo, F G
    de Groot, F
    Salmeron, M
    Electronic structure of cobalt nanocrystals suspended in liquid2007In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 7, no 7, p. 1919-1922Article in journal (Refereed)
    Abstract [en]

    The electronic structure of cobalt nanocrystals suspended in liquid as a function of size has been investigated using in situ X-ray absorptionand emission spectroscopy. A sharp absorption peak associated with the ligand molecules is found that increases in intensity upon reducingthe nanocrystal size. X-ray Raman features due to d−d and to charge-transfer excitations of ligand molecules are identified. The study revealsthe local symmetry of the surface of E-Co phase nanocrystals, which originates from a dynamic interaction between Co nanocrystals andsurfactant + solvent molecules.

  • 46.
    Magnuson, Martin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Butorin, Sergei
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Agui, A
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Resonant soft X-ray Raman scattering of NiO2002In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 14, no 13, p. 3669-3676Article in journal (Refereed)
    Abstract [en]

    Resonant soft x-ray Raman scattering measurements on NiO have been made at photon energies across the Ni 2p absorption edges. The details of the spectral features are identified as Raman scattering due to d-d and charge-transfer excitations. The spectra are interpreted within the single-impurity Anderson model, including multiplets, crystal-field and charge-transfer effects. At threshold excitation, the spectral features consists of triplet-triplet and triplet-singlet transitions of the 3d8 configuration. For excitation energies corresponding to the charge-transfer region in the Ni 2p x-ray absorption spectrum of NiO, the emission spectra are instead dominated by charge-transfer transitions to the 3d9\underline L-1 final state. Comparisons of the final states with other spectroscopical techniques are also made.

    Download full text (pdf)
    fulltext
  • 47.
    Magnuson, Martin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Butorin, Sergei
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Guo, J H
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Electronic structure investigation of CoO by means of soft x-ray scattering2002In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 65, no 20, p. 205106-Article in journal (Refereed)
    Abstract [en]

    The electronic structure of CoO is studied by resonant inelastic soft x-ray scattering spectroscopy using photon energies across the Co 2p absorption edges. The different energy-loss structures in the Raman scattering spectra are identified as due to d-d and charge-transfer excitations. For excitation energies close to the L3 resonance, the spectral features are dominated by quartet-quartet and quartet-doublet transitions of the 3d7 configuration. At excitation energies corresponding to the satellites in the Co 2p x-ray-absorption spectrum of CoO, the emission features are instead dominated by charge-transfer transitions to the 3d8-1 final state. The spectra are interpreted and discussed with the support of simulations within the single-impurity Anderson model with full multiplet effects which are found to yield consistent spectral functions to the experimental data.

    Download full text (pdf)
    fulltext
  • 48.
    Magnuson, Martin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Butorin, Sergei M
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Guo, JH
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Agui, A
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
    Ogasawara, H
    Kotani, A
    Takahashi, T
    Kunii, S
    Electronic-structure investigation of CeB6 by means of soft-x-ray scattering2001In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 63, no 7, p. 075101-Article in journal (Refereed)
    Abstract [en]

    The electronic structure of the heavy fermion compound CeB6 is probed by resonant inelastic soft-x-ray scattering using photon energies across the Ce 3d and 4dabsorption edges. The hybridization between the localized 4f orbitals and the delocalized valence-band states is studied by identifying the different spectral contributions from inelastic Raman scattering and normal fluorescence. Pronounced energy-loss structures are observed below the elastic peak at both the 3d and 4dthresholds. The origin and character of the inelastic scattering structures are discussed in terms of charge-transfer excitations in connection to the dipole allowed transitions with 4f character. Calculations within the single-impurity Anderson model with full multiplet effects are found to yield consistent spectral functions to the experimental data.

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  • 49.
    Magnuson, Martin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Butorin, Sergei
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Såthe, Conny
    Nordgren, Joseph
    Ravindran, P
    Spin transition in LaCoO3 investigated by resonant soft X-ray emission spectroscopy2004In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 68, no 2, p. 289-295Article in journal (Refereed)
    Abstract [en]

    The spin transition in LaCoO3 is investigated by temperature-dependent resonant soft X-ray emission spectroscopy near the Co 2p absorption edges. This element-specific technique is more bulk sensitive with respect to the temperature-induced spin state of the Co3+ ions in LaCoO3 than other high-energy spectroscopic methods. The spin transition is interpreted and discussed with ab initio density-functional theory within the fixed-spin moment method, which is found to yield consistent spectral functions to the experimental data. The spectral changes for LaCoO3 as a function of temperature suggest a change in spin state as the temperature is raised from 85 to 300 K, while the system remains in the same spin state as the temperature is further increased to 510 K.

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  • 50.
    Magnuson, Martin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Butorin, Sergei
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Werme, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Nordgren, Joseph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
    Ivanov, Kiril
    Guo, Jinghua
    Shuh, David
    Uranium oxides investigated by X-ray absorption and emission spectroscopies2006In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 252, no 15, p. 5615-5618Article in journal (Refereed)
    Abstract [en]

    X-ray absorption and resonant X-ray emission measurements at the O 1s edge of the uranium oxides UO2, U3O8 and UO3 are presented. The spectral shapes of the O Kα X-ray emission spectra of UO3 exhibit significant excitation energy dependence, from an asymmetric to a symmetric form, which differs from those of UO2 and U3O8. This energy dependence is attributed to a significant difference in the oxygen–uranium hybridization between two different sites in the crystal structure of UO3. The spectral shapes of UO2 and U3O8 are also found to be different but without significant energy dependence. The experimental spectra of the valence and conduction bands of the uranium oxides are compared to the results of electronic structure calculations available in the literature.

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