Dynamics of a hole in a CuO4 plaquette:: Electron energy-loss spectroscopy of Li2CuO2

被引：34

作者：

Atzkern, S

Knupfer, M

Golden, MS

Fink, J

Waidacher, C

Richter, J

Becker, KW

Motoyama, N

Eisaki, H

Uchida, S

机构：

[1] Inst Festkorper & Werkstofforsch Dresden, D-01171 Dresden, Germany

[2] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany

[3] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.62.7845

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the energy- and momentum-dependent loss function of Li2CuO2 single crystals by means of electron energy-loss spectroscopy in transmission. Using the same values for the model parameters, the low-energy features of the spectrum as well as published Cu 2p(3/2) x-ray photoemission data of Li2CuO2 are well described by a cluster model that consists of a single CuO4 plaquette only. This demonstrates that charge excitations in Li2CuO2 are strongly localized.

引用

页码：7845 / 7849

页数：5

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