Topological interlayer superconductivity in a van der Waals heterostructure

Even Thingstad; Joel Hutchinson; Daniel Loss; Jelena Klinovaja

doi:10.1103/PhysRevB.111.L060505

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Topological interlayer superconductivity in a van der Waals heterostructure

Even Thingstad, Joel Hutchinson, Daniel Loss, Jelena Klinovaja

DOI 10.1103/PhysRevB.111.L060505 · Physical Review B

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Abstract

We show that when a honeycomb antiferromagnetic insulator (AFMI) is sandwiched between two transition-metal dichalcogenide (TMD) monolayers, magnons in the AFMI can mediate an interaction between electrons in the TMDs that gives rise to interlayer Cooper pairing. This interaction opens coexisting extended s-wave and chiral p-wave superconducting gaps in the energy spectrum of the coupled system. The latter gives rise to topological Majorana edge modes. The mechanism we propose therefore provides a path to realize an intriguing type of topological interlayer pairing in a class of van der Waals heterostructures.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MoSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown