ELECTRONIC STATES IN LA2-XSRXCUO4+GAMMA PROBED BY SOFT-X-RAY ABSORPTION

被引：352
作者：
CHEN, CT
SETTE, F
MA, Y
HYBERTSEN, MS
STECHEL, EB
FOULKES, WMC
SCHLUTER, M
CHEONG, SW
COOPER, AS
RUPP, LW
BATLOGG, B
SOO, YL
MING, ZH
KROL, A
KAO, YH
机构：
[1] SANDIA NATL LABS,DIV CONDENSED MATTER THEORY 1151,ALBUQUERQUE,NM 87185
[2] SUNY BUFFALO,DEPT PHYS,BUFFALO,NY 14260
来源：
PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.66.104
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Oxygen K-edge absorption spectra of carefully characterized La2-xSrxCuO4+delta samples were measured using a bulk-sensitive fluorescence-yield-detection method. They reveal two distinct pre-edge peaks which evolve systematically as a function of Sr concentration. The measured spectra are quantitatively described by calculations based on the Hubbard model, including local Coulomb interactions and core-hole excitonic correlations. The absorption data are consistent with a description of electronic states based on a doped charge-transfer insulator.
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页码：104 / 107
页数：4
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