Effect of opposite-spin coupling on the edge states of two-dimensional topological insulator

Authors

  • Gene Itable National Institute of Physics, University of the Philippines Diliman

Abstract

The Bernevig-Hughes-Zhang model for a two-dimensional topological insulator, insulator with conducting edges, is modified. In particular, we introduce a coupling between opposite spins that preserves the model's time reversal invariance. We derive the wave function and the existence conditions for the edge states. With these conditions and tight-binding calculations, we show that that the edge states are robust when the coupling is weak and lesser than the material parameter characterizing the spin-orbit coupling.

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Issue

Article ID

SPP-2017-PB-13

Section

Poster Session B (Complex Systems, Simulations, and Theoretical Physics)

Published

2017-06-07

How to Cite

[1]
G Itable, Effect of opposite-spin coupling on the edge states of two-dimensional topological insulator, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-13 (2017). URL: https://proceedings.spp-online.org/article/view/SPP-2017-PB-13.