AUGER AND PHOTOELECTRON STUDY OF THE HUBBARD U IN C-60, K3C60, AND K6C60

Authors
BRUHWILER PA MAXWELL AJ NILSSON A MARTENSSON N GUNNARSSON O
Citation
Pa. Bruhwiler et al., AUGER AND PHOTOELECTRON STUDY OF THE HUBBARD U IN C-60, K3C60, AND K6C60, Physical review. B, Condensed matter, 48(24), 1993, pp. 18296-18299
Citations number
37
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
48
Issue
24
Year of publication
1993
Pages
18296 - 18299
Database
ISI
SICI code
0163-1829(1993)48:24<18296:AAPSOT>2.0.ZU;2-X
Abstract
Comparison of valence-photoelectron to Auger-electron spectra has been carried out fbr three phases of KxC60, x = 0, 3, 6, yielding Hubbard correlation energies, U, of 1.4 eV (1.5 eV) for x =0 (6), consistent w ith the results of Lof et al. [Phys. Rev. Lett. 68, 3924 (1992)]. At x = 3 the results are best described by intermolecular charge-transfer screening of the C Is core hole in the Auger initial state, with U of the same magnitude as for x = 0 and 6.