ELECTRONIC-STRUCTURE OF ELECTRON-DOPED SUPERCONDUCTING CUPRATES STUDIED BY PHOTOELECTRON-SPECTROSCOPY

被引：4

作者：

GRASSMANN, A ^{[1
]}

STROBEL, J ^{[1
]}

SAEMANNISCHENKO, G ^{[1
]}

JOHNSON, RL ^{[1
]}

机构：

[1] UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 57,GERMANY

来源：

PHYSICA B | 1990年 / 163卷 / 1-3期

关键词：

D O I：

10.1016/0921-4526(90)90186-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Photoemission data of n-type superconducting RE2-xCexCuO4-δ (RE = Pr, Nd and Sm) and Nd2CuO4-yFy are presented. An XPJ and an XPS resonant photoemission study reveals that the RE elements are trivalent with decreasing 4f-O 2p-hybridization from RE = Pr to Sm, whereas Ce has a valence of 3.6. The partial Cu 3d emission shows valence band satellites indicating the existence of strong electron-electron correlation. These results can be well reproduced by cluster calculations. An decrease of the on-site Coulomb repulsion energy U from RE = Pr to Sm is found in RE2-xCexCuO4-δ. © 1990.

引用

页码：261 / 263

页数：3

共 9 条

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