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Jin, Hosub
Quantum Materials Design Lab
Research Interests
  • Spin-orbit coupling, electron-correlation, topological quantum phases

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Candidates for topological insulators: Pb-based chalcogenide series

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Title
Candidates for topological insulators: Pb-based chalcogenide series
Author
Jin, HosubSong, Jung-HwanFreeman, Arthur JKanatzidis, Mercouri G
Keywords
HGTE QUANTUM-WELLS; SINGLE DIRAC CONE; PLANE-WAVE METHOD; SURFACE; APPROXIMATION; PHASE
Issue Date
2011-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.83, no., 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.
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DOI
10.1103/PhysRevB.83.041202
ISSN
2469-9950
Appears in Collections:
PHY_Journal Papers
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