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Observation of topological transition in high-T$_{c}$ superconductor FeTe$_{1-x}$Se$_{x}$/SrTiO$_{3}$(001) monolayers
- Source :
- Phys. Rev. B 100, 155134 (2019)
- Publication Year :
- 2019
-
Abstract
- Superconductors with topological surface or edge states have been intensively explored for the prospect of realizing Majorana bound states, which obey non-Abelian statistics and are crucial for topological quantum computation. The traditional routes for making topological insulator/superconductor and semiconductor/superconductor heterostructures suffer fabrication difficulties and can only work at low temperature. Here, we use angle-resolved photoemission spectroscopy to directly observe the evolution of a topological transition of band structure nearby the Fermi level in two-dimensional high-T$_{c}$ superconductor FeTe$_{1-x}$Se$_{x}$/SrTiO$_{3}$(001) monolayers, fully consistent with our theoretical calculations. Furthermore, evidence of edge states is revealed by scanning tunneling spectroscopy with assistance of theoretical calculations. Our study provides a simple and tunable platform for realizing and manipulating Majorana states at high temperature.<br />Comment: 19 pages, 4 figures and 1 table
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 100, 155134 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.1903.05968
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.100.155134