Double degeneracy and Jahn-Teller effects in colossal-magnetoresistance perovskites

被引：88

作者：

Zang, J ^{[1
]}

Bishop, AR ^{[1
]}

Roder, H ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.53.R8840

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Jahn-Teller (JT) electron-phonon-coupling effects in the colossal-magnetoresistance perovskite compounds La(1-x)A(x)MnO(3) are investigated. Electron-electron correlations between two degenerate Mn e(g) orbitals are studied in the Gutzwiller approximation. The static JT distortion and nonadiabatic polaron effects are studied in a modified Lang-Firsov approximation. We find that (i) the electron or hole character of the charge carrier depends on the static JT distortion and (ii) due to the two-component nature of the JT coupling, fluctuations in the JT distortion direction contribute to the charge transport in similar fashion as the local spins.

引用

页码：R8840 / R8843

页数：4

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