Title
Single-Dirac-Cone Topological Surface States in the TlBiSe₂ Class of Topological Semiconductors
Abstract
We investigate several strong spin-orbit coupling ternary chalcogenides related to the (Pb,Sn)Te series of compounds. Our first-principles calculations predict the low-temperature rhombohedral ordered phase in TlBiTe₂, TlBiSe₂, and TlSbX₂ (X=Te, Se, S) to be topologically nontrivial. We identify the specific surface termination that realizes the single Dirac cone through first-principles surface state computations. This termination minimizes effects of dangling bonds, making it favorable for photoemission experiments. In addition, our analysis predicts that thin films of these materials could harbor novel 2D quantum spin Hall states, and support odd-parity topological superconductivity.
Keywords
TlBiSe₂, topological semiconductors, rhombohedral ordered phase, single dirac cone, spin orbit coupling ternary
Subject Categories
Chalcogenides, Photoemission
Disciplines
Physics
Publisher
American Physical Society
Publication Date
7-16-2010
Rights Information
Copyright 2010 American Physical Society
Rights Holder
American Physical Society
Recommended Citation
Lin, Hsin; Markiewicz, R. S.; Wray, L. A.; Fu, L.; Hasan, M. Z.; and Bansil, A., "Single-Dirac-Cone Topological Surface States in the TlBiSe₂ Class of Topological Semiconductors" (2010). Physics Faculty Publications. Paper 425.
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Notes
Originally published in Physical Review Letters v.105 (2010): 036404. DOI: 10.1103/PhysRevLett.105.036404