Orbital magnetization and its effect in antiferromagnets on the distorted fcc lattice

Orbital magnetization and its effect in antiferromagnets on the distorted fcc lattice
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轨道磁化及其反铁磁体对扭曲面心立方晶格的影响

DOI:
10.1103/physrevb.76.094406
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发表时间:
2007-06
期刊:
影响因子:
3.7
通讯作者:
Wang, Zhigang
Wang, Zhigang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang, Ping;Shi, Junren;Wang, Zhigang

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研究了畸变面心立方晶格上反铁磁体的本征轨道磁化。晶格畸变和自旋挫折的结合导致了非平凡的k空间陈氏不变量,从而对OM性质产生了深远的影响。推导出了电导率与霍尔电导率之间的特定关系,并据此发现,当电子化学势位于莫特间隙时,本征电导率消失。本征OM在金属区和绝缘区表现出明显的特性。讨论了贝里相对热电输运的影响。
We study the intrinsic orbital magnetization (OM) in antiferromagnets on the distorted face-centered-cubic lattice. The combined lattice distortion and spin frustration induce nontrivial k-space Chern invariant, which turns to result in profound effects on the OM properties. We derive a specific relation between the OM and the Hall conductivity, according to which it is found that the intrinsic OM vanishes when the electron chemical potential lies in the Mott gap. The distinct behavior of the intrinsic OM in the metallic and insulating regions is shown. The Berry phase effects on the thermoelectric transport is also discussed.
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