Jahn-Teller effect on orbital ordering and dynamics in ferromagnetic LaMnO 3
Jahn-Teller effect on orbital ordering and dynamics in ferromagnetic LaMnO 3
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Jahn-Teller 效应对铁磁 LaMnO 3 轨道有序性和动力学的影响
DOI：
10.1103/physrevb.62.r6085
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
A. Oleś
中科院分区：
文献类型：
--
作者：
J. Bała;A. Oleś
研究了超交换作用和耦合作用对LaMnO_3铁磁相中强关联电子晶格自由度的联合影响。分析了离子位移和轨道有序度作为单轴压力和Jahn-Teller相互作用的函数。我们报道了由晶格耦合引起的轨道激发光谱的大间隙，这可能导致轻掺杂LaMnO_3绝缘体中空穴的强烈限制。
We study the combined influence of superexchange interactions and coupling to lattice degrees of freedom of strongly correlated e g electrons in the ferromagnetic phase of LaMnO 3. Ionic displacements and orbital order are analyzed as a function of uniaxial pressure and the Jahn-Teller interactions. We report a large gap in the orbital excitation spectrum resulting from the lattice coupling which can lead to a strong confinement of holes in lightly doped LaMnO 3 insulators.