Tuning monolayer superconductivity in twisted NbSe${}_2$ graphene heterostructures

Abstract

The recent advent of artificial structures has triggered the emergence of fascinating phenomena that could not exist in natural compounds. A prime example is twisted multilayers, i.e., moiré superlattices represented by magic-angle twisted bilayer graphene (MATBG). As in the case of MATBG, unconventional band hybridization can induce a new type of superconductivity: artificial band engineering by twist induces properties different from the original systems. Here, we apply this perspective to a monolayer superconductor NbSe${}_2$ stacked with a twist on doped graphene. We show that the superconducting states of the NbSe${}_2$ layer change dramatically by varying the twist angle. Our result shows that twist tuning, in addition to substrate effects, will provide a strategy for designing monolayer superconductors with high controllability.

17page, 15figures

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Cited by in corpus (3)

• Twisted Bogoliubov quasiparticles in the superconducting NbSe${}_2$ monolayer on graphene
• Resonant interlayer coupling in NbSe${}_2$-graphite epitaxial moir{é} superlattices
• Specular-Andreev reflection and Andreev interference in an Ising superconductor junction