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Observation of topological superconductivity on the surface of an iron-based superconductor.
- Source :
-
Science . 4/13/2018, Vol. 360 Issue 6385, p182-186. 5p. 5 Diagrams. - Publication Year :
- 2018
-
Abstract
- Topological superconductors are predicted to host exotic Majorana states that obey non-Abelian statistics and can be used to implement a topological quantum computer. Most of the proposed topological superconductors are realized in difficult-to-fabricate heterostructures at very low temperatures. By using high-resolution spin-resolved and angle-resolved photoelectron spectroscopy, we find that the iron-based superconductor FeTe 1 – x Se x ( x = 0.45; superconducting transition temperature T c = 14.5 kelvin) hosts Dirac-cone – type spin-helical surface states at the Fermi level; the surface states exhibit an s-wave superconducting gap below T c . Our study shows that the surface states of FeTe 0.55 Se 0.45 are topologically superconducting, providing a simple and possibly high-temperature platform for realizing Majorana states. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SUPERCONDUCTORS
*MAJORANA fermions
*QUANTUM computers
*SURFACE states
*SPECTROMETRY
Subjects
Details
- Language :
- English
- ISSN :
- 00368075
- Volume :
- 360
- Issue :
- 6385
- Database :
- Academic Search Index
- Journal :
- Science
- Publication Type :
- Academic Journal
- Accession number :
- 129057040
- Full Text :
- https://doi.org/10.1126/science.aan4596