Topological Insulators at Room Temperature

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dc.creatorZhang, Haijun
dc.creatorLiu, Chao-Xing
dc.creatorQi, Xiao-Liang
dc.creatorDai, Xi
dc.creatorFang, Zhong
dc.creatorZhang, Shou-Cheng
dc.date2008-12-09
dc.date.accessioned2026-07-07T12:10:45Z
dc.date.available2026-07-07T12:10:45Z
dc.descriptionTopological insulators are new states of quantum matter with surface states protected by the time-reversal symmetry. In this work, we perform first-principle electronic structure calculations for $Sb_2Te_3$, $Sb_2Se_3$, $Bi_2Te_3$ and $Bi_2Se_3$ crystals. Our calculations predict that $Sb_2Te_3$, $Bi_2Te_3$ and $Bi_2Se_3$ are topological insulators, while $Sb_2Se_3$ is not. In particular, $Bi_2Se_3$ has a topologically non-trivial energy gap of $0.3 eV$, suitable for room temperature applications. We present a simple and unified continuum model which captures the salient topological features of this class of materials. These topological insulators have robust surface states consisting of a single Dirac cone at the $Γ$ point.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0812.1622
dc.identifierhttp://arxiv.org/abs/0812.1622
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210023
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleTopological Insulators at Room Temperature
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