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Onset of metallic ferromagnetism in a doped spin-orbital chain

被引：8
作者：
Daghofer, M
Oles, AM
von der Linden, W
机构：
[1] Graz Univ Technol, Inst Theoret & Computat Phys, A-8010 Graz, Austria
[2] Jagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, Poland
[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2005年 / 242卷 / 02期
关键词：
D O I：
10.1002/pssb.200460050
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Starting from a spin-orbital model for doped manganites, we investigate a competition between ferromagnetic and antiferromagnetic order in a one-dimensional model at finite temperature. The magnetic and orbital order at half filling support each other and depend on a small antiferromagnetic superexchange between t(2g) spins and on an alternating Jahn-Teller potential. The crossover to a metallic ferromagnetic phase found at finite doping is partly suppressed by the Jahn-Teller potential which may localize e(g) electrons. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：311 / 316
页数：6
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