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

Authors

  • Gene Itable ⋅ PH 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

Opportunities and challenges in physics collaboration and research
7-10 June 2017, Cebu City

Mabuhay! This is our first issue published using PKP's Online Journal Systems (OJS). Full online access to PDF articles is provided to registered Paperview users.

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.