Fermiology of possible topological superconductor Tl0.5Bi2Te3 derived from hole-doped topological insulator
| Autor: | Trang, C. X., Wang, Z., Takane, D., Nakayama, K., Souma, S., Sato, T., Takahashi, T., Taskin, A. A., Ando, Yoichi |
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| Rok vydání: | 2016 |
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| Zdroj: | Phys. Rev. B 93, 241103(R) (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.93.241103 |
| Popis: | 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. Comment: 5 pages, 4 figures (paper proper) + 1 pages, 1 figures (supplemental material); final version accepted for publication in PRB Rapid Communication |
| Databáze: | arXiv |
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