Spin Texture and Mirror Chern number in Hg-Based Chalcogenides
arXiv:1404.7091 · doi:10.1103/PhysRevB.91.165435
Abstract
The unique feature of surface states in topological insulators is the so-called "spin-momentum locking", which means that electron spin is oriented along a fixed direction for a given momentum and forms a texture in the momentum space. In this work, we study spin textures of two typical topological insulators in Hg-Based Chalcogenides, namely HgTe and HgS, based on both the first principles calculation and the eight band Kane model. We find opposite helicities of spin textures between these two materials, originating from the opposite signs of spin-orbit couplings. Furthermore, we reveal that different mirror Chern numbers between HgTe and HgS characterize different topological natures of the systems with opposite spin textures and guarantee the existence of gapless interface states.
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Cited by in corpus (10)
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- Theoretical search for half-Heusler topological insulators
- Surface-state spin textures and mirror Chern numbers in topological Kondo insulators
- Topological Nonsymmorphic Crystalline Superconductors
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