Spin-state transition and high-spin polarons in LaCoO3

被引：302

作者：

Yamaguchi, S

Okimoto, Y

Taniguchi, H

Tokura, Y

机构：

[1] Department of Applied Physics, University of Tokyo

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.53.R2926

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spin gap energy (approximate to 30 meV) associated with the low-spin (S=O) to high-spin (S=2) transition in LaCoO3 was proved to be considerably smaller than the charge gap energy (approximate to 0.1 eV) which was estimated by optical spectroscopy. Hole doping in the low-spin ground state of LaCoO3 leads to formation of localized magnetic polarons with unusually high spin number (S=10-16), which can be viewed as a precursor of the doping-induced ferromagnetic metallic state.

引用

页码：R2926 / R2929

页数：4

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[21] GIANT MAGNETOTRANSPORT PHENOMENA IN FILLING-CONTROLLED KONDO-LATTICE SYSTEM - LA1-XSRXMNO3 [J].