Jahn-Teller effect and superexchange in half-doped manganites

被引：2
|
作者：
Sikóra, O [1 ]
Oles, AM [1 ]
机构：
[1] Jagiellonian Univ, Marian Smoluchowski Inst Phys, PL-30059 Krakow, Poland
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2003年 / 236卷 / 02期
关键词：
D O I：
10.1002/pssb.200301684
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We investigate the stability of the charge exchange (CE) phase within a microscopic model which describes a single plane as in La0.5Sr1.5MnO4. The model includes Coulomb interactions (on-site and intersite), the Jahn-Teller term and the superexchange interactions due to e(g) and t(2g) electrons. By investigating the phase diagram at T = 0 in mean-field approximation we conclude that the superexchange interactions can stabilize the CE phase, but only if they are stronger than estimated from spectroscopy.
引用
收藏
页码：380 / 383
页数：4
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