Bloch Electrons in a Jahn-Teller Crystal and an Orbital-Density-Wave State due to the Berry Phase
Bloch Electrons in a Jahn-Teller Crystal and an Orbital-Density-Wave State due to the Berry Phase
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Jahn-Teller 晶体中的布洛赫电子和贝里相导致的轨道密度波态
DOI：
10.1103/physrevlett.80.4518
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发表时间：
1998
影响因子：
8.6
通讯作者：
Y. Takada
中科院分区：
文献类型：
--
作者：
H. Koizumi;T. Hotta;Y. Takada
Berry相的影响被明确地包含在描述晶体中传导电子的波函数中，该晶体由周期性排列的Jahn-Teller中心组成，这些Jahn-Teller中心具有锥形相交的势能面。Berry相可以使能带结构发生剧烈变化，通常导致轨道密度波态的形成。我们讨论了我们的理论的含义，以及与在锰钙钛矿中观察到的轨道有序性的可能关系。
The effect of the Berry phase is included explicitly in the wavefunction describing conduction electrons in a crystal composed of periodically arrayed Jahn-Teller centers that have conically intersecting potential energy surfaces. The Berry phase can make a drastic change in the band structure, leading generally to the formation of an orbital-density-wave state. We discuss implications of our theory and possible relations to the orbital ordering observed in the manganese perovskites.