Abstract
Molybdenum disulphide () has attracted much interest in recent years due to its potential applications in a new generation of electronic devices. Recently, it was shown that thin films of can become superconducting with a highest of 10 K when the material is heavily gated to the conducting regime. In this work, using the group theoretical approach, we determine the possible pairing symmetries of heavily gated . Depending on the electron-electron interactions and Rashba spin-orbit coupling, the material can support an exotic spin-singlet -wavelike, an exotic spin-triplet -wavelike, and a conventional spin-triplet -wave pairing phase. Importantly, the exotic spin-singlet -wave phase is a topological superconducting phase that breaks time-reversal symmetry spontaneously and possesses nonzero Chern numbers where the Chern number determines the number of branches of chiral Majorana edge states.
- Received 25 May 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.097001
© 2014 American Physical Society