論文

査読有り
2013年10月

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

PHYSICAL REVIEW B
  • Tetsuro Habe
  • ,
  • Yasuhiro Asano

88
15
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.88.155442
出版者・発行元
AMER PHYSICAL SOC

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.

Web of Science ® 被引用回数 : 6

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.88.155442
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000326389800008&DestApp=WOS_CPL

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