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Size-dependent evolution of electronic structure in neutral Pb clusters-As seen by synchrotron-based X-ray photoelectron spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
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2014 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, E-ISSN 1873-2526, Vol. 195, 55-61 p.Article in journal (Refereed) Published
Abstract [en]

Neutral Pb clusters in the size range from a few tens of atoms up to similar to 100 atoms are studied using synchrotron-based photoelectron spectroscopy. The electronic structure is seen to differ increasingly from that of the solid when the cluster size decreases. The valence band narrows gradually - down to about one fifth of the solid-state band width at the smallest size of few tens of atoms. Simultaneously the Fermi-edge energy shifts further away from the solid value by more than 2 eV. The Pb 5d core level binding energy also increases and the spectral features broaden and change in shape. The changes observed for the valence and for the 5d response energies and shapes are discussed in the context of the metal-to-insulator transition observed earlier in Pb clusters below the critical size of 20-30 atoms/cluster. (C) 2014 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2014. Vol. 195, 55-61 p.
Keyword [en]
Metal clusters, Photoelectron spectroscopy, Synchrotron radiation
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-236100DOI: 10.1016/j.elspec.2014.05.011ISI: 000342872800008OAI: oai:DiVA.org:uu-236100DiVA: diva2:763380
Available from: 2014-11-14 Created: 2014-11-12 Last updated: 2017-12-05Bibliographically approved

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Svensson, SvanteBjörneholm, Olle

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