Effect of opposite-spin coupling on the edge states of two-dimensional topological insulator
Keywords:
Topological quantum phasesAbstract
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.
Downloads
Published
Issue
Section
License
By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.
