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Robustness of gapless interface states in a junction of two topological insulators

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Robustness of gapless interface states in a junction of two topological insulators.pdf4.51 MBPDF見る/開く
この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/54758

タイトル: Robustness of gapless interface states in a junction of two topological insulators
著者: Habe, Tetsuro 著作を一覧する
Asano, Yasuhiro 著作を一覧する
発行日: 2013年10月31日
出版者: Amer physical soc
誌名: Physical review b
巻: 88
号: 15
開始ページ: 155442-1
終了ページ: 155442-12
出版社 DOI: 10.1103/PhysRevB.88.155442
抄録: We theoretically study subgap states appearing at the interface between two three-dimensional topological insulators which have different configurations in the spin-orbit interactions from each other. The coupling of spin sigma with momenta p is configured by a material dependent 3 x 3 matrix A as sigma(mu) A(mu)(nu)P(nu). The spectra of the interface subgap states depend on the relative choices of A's in the two topological insulators where the two A are connected by the unitary transformation including the inversion and the rotation in momentum space. The gapless states appear at the interface when the transformation includes the inversion. The two topological insulators can be distinguished by using the topological numbers defined in the two- or one-dimensional partial Brillouin zone, which explains the presence of the gapless interface states. We also discuss the robustness of such gapless states under perturbations breaking the time-reversal symmetry or the band-inversion symmetry.
Rights: ©2013 American Physical Society
資料タイプ: article
URI: http://hdl.handle.net/2115/54758
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 浅野 泰寛

 

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