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|a Chen, Kuang-Ting
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|a Massachusetts Institute of Technology. Department of Physics
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|a Lee, Patrick A.
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|a Lee, Patrick A.
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|a Chen, Kuang-Ting
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|a Lee, Patrick A.
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|a Topological insulator and the theta vacuum in a system without boundaries
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|a Topological insulator and the θ vacuum in a system without boundaries
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|b American Physical Society,
|c 2011-09-30T14:45:16Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/66135
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|a 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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|a National Science Foundation (U.S.) (NSF under Grant No. DMR 0804040)
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|a en_US
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|a Article
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|t Physical Review B
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