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Journal of the Korean Physical Society

, Volume 74, Issue 1, pp 41–47 | Cite as

Hybridization Effects of Normal Insulator on Two-Dimensional Topological Insulator

  • Jiseon Shin
  • Gun Sang JeonEmail author
Article
  • 5 Downloads

Abstract

We consider a geometry where a quantum spin Hall insulator and a normal insulator are in contact with each other on the same plane. We show that our numerical results in finite-system approach agree with analytic results of an earlier work in a quantum spin Hall insulator. We discuss the effects of properties of normal insulators on the probability density of edge states at the interface. The edge-state width is computed by varying the interface hopping and the staggered lattice potential. We also attempt to explain the energy dispersions of edge states by constructing effective Hamiltonian and discuss its validity.

Keywords

Topological insulator Edge states Spin-orbit coupling 

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Copyright information

© The Korean Physical Society 2019

Authors and Affiliations

  1. 1.Department of PhysicsEwha Womans UniversitySeoulKorea

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