Interaction-induced topological superconductivity in antiferromagnet-superconductor junctions

Senna Luntama, Päivi Törmä, Jose Lado

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Abstract

We predict that junctions between an antiferromagnetic insulator and a superconductor provide a robust platform to create a one-dimensional topological superconducting state. Its emergence does not require the presence of intrinsic spin-orbit coupling nor noncollinear magnetism, but arises solely from repulsive electronic interactions on interfacial solitonic states. We demonstrate that a topological superconducting state is generated by repulsive interactions at arbitrarily small coupling strength, and that the size of the topological gap rapidly saturates to one of the parent trivial superconductor. Our results put forward antiferromagnetic insulators as a new platform for interaction-driven topological superconductivity.
Original languageEnglish
Article numberL012021
Pages (from-to)1-7
Number of pages7
JournalPHYSICAL REVIEW RESEARCH
Volume3
Issue number1
DOIs
Publication statusPublished - 5 Mar 2021
MoE publication typeA1 Journal article-refereed

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