Electronic structure and magnetic states in La1-xSrxCoO3 studied by photoemission and x-ray-absorption spectroscopy

被引：154

作者：

Saitoh, T

Mizokawa, T

Fujimori, A

Abbate, M

Takeda, Y

Takano, M

机构：

[1] UNIV TOKYO, DEPT PHYS, BUNKYO KU, TOKYO 113, JAPAN

[2] LAB NACL LUZ SINCROTRON, BR-13081970 CAMPINAS, BRAZIL

[3] MIE UNIV, FAC ENGN, DEPT CHEM, TSU, MIE 514, JAPAN

[4] KYOTO UNIV, INST CHEM RES, UJI, KYOTO 611, JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.56.1290

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the effects of hole doping on the electronic structure of La1-xSrxCoO3 by photoemission and x-ray-absorption spectroscopy. The Co 2p core-level and the valence-band spectra show charge-transfer satellites, which have been more obviously observed in 3p-3d resonant-photoemission spectra. By Sr substitution for La in LaCoO3, the valence-band spectra do not show rigid-band behavior but change systematically and reflect the semiconductor-to-metal transition which occurs with hole doping. Only small changes with x have been observed in the resonant-photoemission spectra. Combined with configuration-interaction cluster-model calculations, this observation suggests that the intermediate-spin state is realized in the ferromagnetic phase.

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页码：1290 / 1295

页数：6

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