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진호섭

Jin, Hosub
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Candidates for topological insulators: Pb-based chalcogenide series

Author(s)
Jin, HosubSong, Jung-HwanFreeman, Arthur JKanatzidis, Mercouri G
Issued Date
2011-01
DOI
10.1103/PhysRevB.83.041202
URI
https://scholarworks.unist.ac.kr/handle/201301/13410
Fulltext
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.041202
Citation
PHYSICAL REVIEW B, v.83, pp.041202
Abstract
We theoretically predict that the series of Pb-based layered chalcogenides, PbnBi2Sen+3and PbnSb2Ten+3, are possible new candidates for topological insulators, and the topological phases are changed from a topological insulator to a band insulator with increasing n. Among the new topological insulators, we found a large bulk band gap of 0.40 eV in PbBi2Se4, and that of Pb2Sb2Te5 is located near the phase boundary between a trivial and a nontrivial topological insulator, which raises the possibility of tuning the topological phase by changing the external parameters.
Publisher
AMER PHYSICAL SOC
ISSN
2469-9950

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