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  • Letter

Curvature-induced long-range supercurrents in diffusive superconductor-ferromagnet-superconductor Josephson junctions with a dynamic 0−π transition

Tancredi Salamone1,*, Mathias B. M. Svendsen1, Morten Amundsen2, and Sol Jacobsen1

  • 1Center for Quantum Spintronics, Department of Physics, NTNU Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
  • 2Nordita, KTH Royal Institute of Technology and Stockholm University, Hannes Alfvéns väg 12, SE-106 91 Stockholm, Sweden

  • *Corresponding author: tancredi.salamone@ntnu.no
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Phys. Rev. B 104, L060505 – Published 17 August, 2021

DOI: https://doi.org/10.1103/PhysRevB.104.L060505

Abstract

We report that spin supercurrents can be induced in diffusive superconductor-ferromagnet-superconductor Josephson junctions without any magnetic misalignment or intrinsic spin-orbit coupling. Instead, the pathway to spin-triplet generation is provided via geometric curvature, and results in a long-range Josephson effect. In addition, the curvature is shown to induce a dynamically tunable 0−π transition in the junction. We provide the analytic framework and discuss potential experimental and innovation implications.

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Phys. Rev. B 104, L060505– Published 17 August, 2021
  • Received 27 May 2021
  • Accepted 4 August 2021
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