(111) Surface States of SnTe

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(111) Surface States of SnTe

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title (111) Surface States of SnTe
contributor.author Shi, Yin
contributor.author Wu, Meng
contributor.author Zhang, Fan (UT Dallas)
contributor.author Feng, Ji
description.abstract The characterization and applications of topological insulators depend critically on their protected surface states, which, however, can be obscured by the presence of trivial dangling bond states. Our first-principle calculations show that this is the case for the pristine (111) surface of SnTe. Yet, the predicted surface states unfold when the dangling bond states are passivated in proper chemisorption. We further extract the anisotropic Fermi velocities, penetration lengths, and anisotropic spin textures of the unfolded (Gamma) over bar -and (M) over bar -surface states, which are consistent with the theory in Zhang et al. [Phys. Rev. B 86, 081303 (2012)]. More importantly, this chemisorption scheme provides an external control of the relative energies of different Dirac nodes, which is particularly desirable in multivalley transport.
description.sponsorship
identifier.citation Shi, Yin, Meng Wu, Fan Zhang, and Ji Feng. 2014. "(111) surface states of SnTe." Physical Review B 90(23): doi:10.1103/PhysRevB.90.235114.
identifier.issn 1098-0121
identifier.uri http://hdl.handle.net/10735.1/4425
identifier.uri http://dx.doi.org/10.1103/PhysRevB.90.235114
identifier.volume 90
identifier.issue 23
subject Dirac surface states
subject Tin telluride
subject Band gap
subject Density functionals
subject Dangling bonds
date.issued 2014-12--08
rights ©2014 American Physical Society
source.journal Physical Review B

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