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

被引：356

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.

引用

页码：104 / 107

页数：4

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