Bulk electronic structure of K3C60 as revealed by soft x-rays
2007 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 75, no 19, 195432- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2007. Vol. 75, no 19, 195432- p.
IdentifiersURN: urn:nbn:se:uu:diva-11582DOI: 10.1103/PhysRevB.75.195432ISI: 000246890800157OAI: oai:DiVA.org:uu-11582DiVA: diva2:39351