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Topological superconductivity in monolayer transition metal dichalcogenides
- Source :
- Nature Communication 8, 14985(2017)
- Publication Year :
- 2016
-
Abstract
- Theoretically it has been known that breaking spin-degeneracy and effectively realizing 'spinless fermions' is a promising path to topological superconductors. Yet, topological superconductors are rare to date. Here, we propose to realize spinless fermions by splitting the spin-degeneracy in momentum space. Specifically, we identify monolayer hole-doped transition metal dichalcogenide (TMD)s as candidates for topological superconductors out of such momentum-space-split spinless fermions. Although electron-doped TMDs have recently been found superconducting, the observed superconductivity is unlikely topological due to the near spin-degeneracy. Meanwhile, hole-doped TMDs with momentum-space-split spinless fermions remain unexplored. Employing a renormalization group analysis, we propose that the unusual spin-valley locking in hole-doped TMDs together with repulsive interactions selectively favors two topological superconducting states: inter-pocket paired state with Chern number 2 and intra-pocket paired state with finite pair-momentum. A confirmation of our predictions will open up possibilities for manipulating topological superconductors on the device friendly platform of monolayer TMDs.<br />Comment: 12+8 pages, 4+2 figures
Details
- Database :
- arXiv
- Journal :
- Nature Communication 8, 14985(2017)
- Publication Type :
- Report
- Accession number :
- edsarx.1606.00857
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1038/ncomms14985