Topological insulator and the θ vacuum in a system without boundaries

被引：12

作者：

Chen, Kuang-Ting ^{[1
]}

Lee, Patrick A. ^{[1
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.83.125119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper we address two questions concerning the effective action of a topological insulator in one- and three-dimensional space without boundaries, such as a torus. The first is whether a uniform theta term with theta = pi is generated for a strong topological insulator. The second is whether such a term has observable consequences in the bulk. The answers to both questions are positive, but the observability in three dimensions vanishes for infinite system size.

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页数：9

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