Symmetry Protected Weak Topological Phases in a Superlattice
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概要
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We explore novel topological phases realized in a superlattice system based on the Wilson--Dirac model. Our main focus is on a two-dimensional analogue of weak topological insulator phases. We find such phases as those characterized by gapless edge states that are protected by symmetry but sensitive to the orientation of the edge relative to the superlattice structure. We show that manifest and hidden reflection symmetries protect such weak topological phases, and propose bulk \mathbb{Z}_{2} indices responsible for the topological protection of the edge states.
- 2013-07-15
著者
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Fukui Takahiro
Department of Cardiology
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Hatsugai Yasuhiro
Institute For Solid State Physics University Of Tokyo
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Imura Ken-ichiro
Department Of Physics Tohoku University:department Of Quantum Matter Adsm Hiroshima University
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Fukui Takahiro
Department of Physics, Ibaraki University, Mito 310-8512, Japan
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