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arXiv · 1806.07195

Platform for nodal topological superconductors in monolayer molybdenum dichalcogenides

Lin Wang·Tomas Orn Rosdahl·Doru Sticlet
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Abstract

We propose a platform to realize nodal topological superconductors in a superconducting monolayer of MoX$_2$ (X$=$S, Se, Te) using an in-plane magnetic field. The bulk nodal points appear where the spin splitting due to spin-orbit coupling vanishes near the $\pm \boldsymbol{K}$ valleys of the Brillouin zone, and are six or twelve per valley in total. In the nodal topological superconducting phase, the nodal points are connected by flat bands of zero-energy Andreev edge states. These flat bands, which are protected by chiral symmetry, are present for all lattice-termination boundaries except zigzag.

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Lin Wang, Tomas Orn Rosdahl, Doru Sticlet. 2018-06-19. Platform for nodal topological superconductors in monolayer molybdenum dichalcogenides. https://doi.org/10.1103/physrevb.98.205411

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