Interaction-induced topological superconductivity in antiferromagnet-superconductor junctions

Senna Luntama; Päivi Törmä; Jose Lado

doi:10.1103/PhysRevResearch.3.L012021

Interaction-induced topological superconductivity in antiferromagnet-superconductor junctions

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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 language	English
Article number	L012021
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review Research
Volume	3
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevResearch.3.L012021
Publication status	Published - 5 Mar 2021
MoE publication type	A1 Journal article-refereed

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10.1103/PhysRevResearch.3.L012021Licence: CC BY

Luntama_Interaction-Incuced.PhysRevResearch.3.L012021Final published version, 1.07 MBLicence: CC BY

Lado Jose AT-kulut: Engineering fractional quantum matter in twisted van der Waals materials
Lado, J. (Principal investigator), Koch, R. (Project Member), Kumar, P. (Project Member) & Hyart, T. (Project Member)
01/09/2020 → 31/08/2023
Project: RCF Academy Research Fellow: Research costs
Lado Jose AT-palkka: Engineering fractional quantum matter in twisted van der Waals materials
Lado, J. (Principal investigator)
01/09/2020 → 31/08/2025
Project: RCF Academy Research Fellow (new)
Long-range coherence in nanosystems
Törmä, P. (Principal investigator), Topp, G. (Project Member), Pyykkönen, V. (Project Member), Kähärä, J. (Project Member), Moilanen, A. (Project Member), Kumar, P. (Project Member), Julku, A. (Project Member), Salerno, G. (Project Member), Luntama, S. (Project Member), Kliuiev, P. (Project Member), Rosenberg, M. (Project Member), Kuoppala, S. (Project Member), Lamponen, E. (Project Member), Aronen, K. (Project Member), Systä, H. (Project Member), Källman, N. (Project Member) & Arjas, K. (Project Member)
01/01/2020 → 31/12/2021
Project: Academy of Finland: Other research funding

Science-IT
Hakala, M. (Manager)
School of Science
Facility/equipment: Facility

Cite this

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title = "Interaction-induced topological superconductivity in antiferromagnet-superconductor junctions",

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.",

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AU - Luntama, Senna

AU - Törmä, Päivi

AU - Lado, Jose

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N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevResearch.3.L012021

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Interaction-induced topological superconductivity in antiferromagnet-superconductor junctions

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Lado Jose AT-kulut: Engineering fractional quantum matter in twisted van der Waals materials

Lado Jose AT-palkka: Engineering fractional quantum matter in twisted van der Waals materials

Long-range coherence in nanosystems

Equipment

Science-IT

Cite this