Curvature-induced long-range supercurrents in diffusive superconductor-ferromagnet-superconductor Josephson junctions with a dynamic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>0</mml:mn><mml:mtext>−</mml:mtext><mml:mi>π</mml:mi></mml:mrow></mml:math> transition
Tancredi Salamone, Mathias B. M. Svendsen, Morten Amundsen, Sol Jacobsen
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 $0\text{\ensuremath{-}}\ensuremath{\pi}$ transition in the junction. We provide the analytic framework and discuss potential experimental and innovation implications.
Topics & Concepts
Josephson effectCondensed matter physicsPhysicsPi Josephson junctionJosephson energySpin (aerodynamics)CurvatureSquidPhase transitionSuperconductivityMagnetic fieldCurrent (fluid)Transition temperatureQuantum mechanicsJosephson phaseMagnetizationMagnetic fluxPhysics of Superconductivity and MagnetismIron-based superconductors researchQuantum and electron transport phenomena