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Topological Interlayer Superconductivity in a van der Waals Heterostructure

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arxiv 2405.07927 v1 pith:R2SMVDDK submitted 2024-05-13 cond-mat.supr-con

classification cond-mat.supr-con
keywords afmiinteractioninterlayerrisetopologicalwaveantiferromagneticchiral
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abstract

We show that when a honeycomb antiferromagnetic insulator (AFMI) is sandwiched between two transition metal dichalcogenide (TMD) monolayers in a commensurate way, 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, and the latter give rise to topological Majorana edge modes.

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