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Topological nature of FeSe$_{0.5}$Te$_{0.5}$ superconductor
- Source :
- Phys. Rev. B 92, 115119 (2015)
- Publication Year :
- 2015
-
Abstract
- We demonstrate, using first-principles calculations, that the electronic structure of FeSe$_{1-x}$Te$_{x}$ ($x$=0.5) is topologically non-trivial, characterized by an odd $\mathbb Z_2$ invariant and Dirac cone type surface states, in sharp contrast to the end member FeSe ($x$=0). This topological state is induced by the enhanced three-dimensionality and spin-orbit coupling due to Te substitution (compared to FeSe), characterized by a band inversion at the $Z$ point of the Brillouin zone, which is confirmed by our ARPES measurements. The results suggest that the surface of FeSe$_{0.5}$Te$_{0.5}$ may support a non-trivial superconducting channel in proximity to the bulk.<br />Comment: 8 pages, 7 figures, 3 tables
- Subjects :
- Condensed Matter - Materials Science
Condensed Matter - Superconductivity
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 92, 115119 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1506.06766
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.92.115119