Platform for nodal topological superconductors in monolayer molybdenum dichalcogenides

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 $\pm \mathbf{K}$ 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.

arXiv comment16 pages, 7 figures

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Cited by in corpus (10)

• Clean 2D superconductivity in a bulk van der Waals superlattice
• Crystalline Nodal Topological Superconductivity and Bogolyubov Fermi Surfaces in Monolayer NbSe${}_2$
• The influence of lattice termination on the edge states of the quantum spin Hall insulator monolayer $1T^{\prime }$-WTe${}_2$
• Topological superconductivity from magnetic impurities on monolayer NbSe${}_2$
• Dipolar spin waves in uniaxial easy-axis antiferromagnets: A natural topological nodal-line semimetal
• Twisted multilayer nodal superconductors
• Engineering nodal topological phases in Ising superconductors by magnetic superstructures
• Anomalous Charge Density Wave State Evolution and Dome-like Superconductivity in CuIr2Te4-xSex Chalcogenides
• Topological Interlayer Superconductivity in a van der Waals Heterostructure
• Detecting the topological winding of superconducting nodes via Local Density of States