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Topological edge states in single layers of honeycomb materials with strong spin-orbit coupling

Authors :
Catuneanu, Andrei
Kim, Heung-Sik
Can, Oguzhan
Kee, Hae-Young
Publication Year :
2016
Publisher :
arXiv, 2016.

Abstract

We study possible edge states in single layers of honeycomb materials such as $\alpha$-RuCl$_3$ and A$_2$IrO$_3$ (A=Li, Na) with strong spin-orbit coupling (SOC). These two dimensional systems exhibit linearly dispersing one-dimensional (1D) edge states when their 1D boundary forms a zig-zag shape. Using an effective tight-binding model based on first principles band structure calculations including Hubbard U and SOC, we find degenerate edge states at the zone center and zone boundary. The roles of chiral symmetry and time-reversal symmetry are presented. The implications to experimental signatures and the effects of disorder are also discussed.<br />Comment: 5 pages, 2 tables, 4 figures

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....8fa0b59a02d59910eb9433b4ae8bdbbd
Full Text :
https://doi.org/10.48550/arxiv.1605.04916