Trang, C. X., Wang, Z., Takane, D., Nakayama, K., Souma, S., Sato, T., Takahashi, T., Taskin, A. A. and Ando, Yoichi ORCID: 0000-0002-3553-3355 (2016). Fermiology of possible topological superconductor Tl0.5Bi2Te3 derived from hole-doped topological insulator. Phys. Rev. B, 93 (24). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We have performed angle-resolved photoemission spectroscopy on Tl0.5Bi2Te3, a possible topological superconductor derived from Bi2Te3. We found that the bulk Fermi surface consists of multiple three-dimensional hole pockets surrounding the Z point, produced by the direct hole doping into the valence band. The Dirac-cone surface state is well isolated from the bulk bands, and the surface chemical potential is variable in the entire band-gap range. Tl0.5Bi2Te3 thus provides an excellent platform to realize two-dimensional topological superconductivity through a proximity effect from the superconducting bulk. Also, the observed Fermi-surface topology provides a concrete basis for constructing theoretical models for bulk topological superconductivity in hole-doped topological insulators.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Trang, C. X.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wang, Z.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takane, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nakayama, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Souma, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sato, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takahashi, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Taskin, A. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ando, YoichiUNSPECIFIEDorcid.org/0000-0002-3553-3355UNSPECIFIED
URN: urn:nbn:de:hbz:38-272311
DOI: 10.1103/PhysRevB.93.241103
Journal or Publication Title: Phys. Rev. B
Volume: 93
Number: 24
Date: 2016
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
BI2TE3Multiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/27231

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