Berry phase effect on the exciton transport and on the exciton Bose-Einstein condensate

被引：63

作者：

Yao, Wang ^{[1
]}

Niu, Qian ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.101.106401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

With the exciton lifetime much extended in semiconductor quantum-well structures, the exciton transport and Bose-Einstein condensation have become a focus of research in recent years. We reveal a momentum-space gauge field in the exciton center-of-mass dynamics due to Berry phase effects. We predict a spin-dependent transport of the excitons analogous to the anomalous Hall and Nernst effects for electrons. We also predict spin-dependent circulation of a trapped exciton gas and instability in an exciton condensate in favor of vortex formation.

引用

页数：4

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