关于量子自旋霍尔模型的$Z_2$分类
介观与纳米尺度物理
2009-11-01 v2
摘要
我们提出了当时间反演不变性未被破坏时,量子自旋霍尔系统和能带绝缘体的拓扑指标的一种替代表述。该指标用模型能带的陈数表示,从而与鲁棒边缘态的对数建立了联系。在大多数感兴趣的情况下,这种替代指标易于计算。我们还讨论了与最近提出的量子自旋霍尔模型的自旋陈数的联系。
引用
@article{arxiv.cond-mat/0604211,
title = {On the $Z_2$ classification of Quantum Spin Hall Models},
author = {Rahul Roy},
journal= {arXiv preprint arXiv:cond-mat/0604211},
year = {2009}
}
备注
Presentation changed to improve clarity, some technical aspects of the topological arguments including material previously cited as unpublished notes have now been added as an appendix