常治文,刘鑫

• 1:北京工业大学理学部
• 2:北京工业大学北京-都柏林国际学院

摘要(Abstract)：

基于量子霍尔效应发展而来的拓扑绝缘体是凝聚态物理重要的科学前沿之一。通常可用第一陈数(Chern number)这一拓扑不变量来描述时间反演对称性破缺的拓扑绝缘体。传统上表征拓扑绝缘体的拓扑场论是一种有效场论,其中的基本场由"统计规范势"来充当,给出的是系统的大范围拓扑性质。本文当中我们对两带模型(two-band model)引入一种新的拓扑规范理论,它以群空间的哈密顿矢量和布洛赫波函数为基本场,可诱导出单极(monopole)与半子(meron)拓扑缺陷。

关键词(KeyWords)： 拓扑绝缘体;量子霍尔效应;拓扑场论;两带模型;拓扑激发

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(11572005);; 北京市自然科学基金重点项目(Z180007)

作者(Author): 常治文,刘鑫

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