Spin, charge, orbital and lattice degrees of freedom in quasi-cubic manganites: A brief review

被引：12

作者：

Schlottmann, P. ^{[1
]}

机构：

[1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

来源：

PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 18期

关键词：

Manganites; Jahn-Teller effect; Double exchange; Orbital order; PHASE-SEPARATION; DOUBLE-EXCHANGE; A-PHASE; ORDER; PHYSICS;

D O I：

10.1016/j.physb.2009.06.066

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The rich phase diagram of La1-xCaxMnO3 is the consequence of the interplay of spin, charge, orbital and lattice degrees of freedom, giving rise to several magnetic phases, Jahn-Teller distortions, spin-canting and phase separation, and orbital and charge order. Each Mn ion is in a mixed valent state of two magnetic configurations, Mn4+ and Mn3+. We study the phase diagram using mean-field slave bosons for the itinerant e(g)-electrons in two orbitals with excluded multiple occupancy of each site, Hund's rule interaction between the e(g) and t(2g) states and Jahn-Teller coupling of the eg orbitals to the lattice. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2699 / 2704

页数：6

共 32 条

[1] Theoretical study of half-doped models for manganites: Fragility of CE phase with disorder, two types of colossal magnetoresistance, and charge-ordered states for electron-doped materials [J].