Robust parity-mixed superconductivity in disordered monolayer transition metal dichalcogenides

Abstract

Monolayer NbSe${}_2$ is a nodal topological Ising superconductor at magnetic in-plane fields exceeding the Pauli limit, with nodal points strictly on high symmetry lines in the Brillouin zone. Here, we use a combined numerical and group-theoretical approach in real-space to characterize the unconventional superconducting state in monolayer transition metal dichalcogenides. Even with a conventional pairing interaction, the superconducting state is intrinsically parity-mixed and robust against on-site disorder. The interplay between the Zeeman magnetic field, strong spin-orbit interaction, and electronic orbital content confer the unique superconducting and topological properties. The discussion also extends to strongly hole-doped MoS${}_2$ and its relatives.

arXiv comment25 pages, 9 figures

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Cited by in corpus (40)

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• Visualization of Topological Boundary Modes Manifesting Topological Nodal-Point Superconductivity
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• Electrical switching of Ising-superconducting nonreciprocity for quantum neuronal transistor
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• Engineering nodal topological phases in Ising superconductors by magnetic superstructures
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