ROBINSON, J.; SAMOKHVALOV, A.; BUZDIN, Alexandre I.

doi:10.1103/PhysRevB.99.180501

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ROBINSON, J.
Seychelles Fishing Authority (SFA) [SFA]

SAMOKHVALOV, A.
Institute for Physics of Microstructures of the RAS

BUZDIN, Alexandre I.
Centre de physique moléculaire optique et hertzienne [CPMOH]

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Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2019-05, vol. 99, n° 18

American Physical Society

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At a superconductor interface with a ferromagnetic insulator (FI), the FI acts to induce a local exchange field within the S layer, which in the presence of spin-orbit interaction promotes a phase-modulated superconducting state. Here we demonstrate that within a thin superconducting loop that is partially proximitized by a FI, spontaneous currents form with a magnetization-orientation-dependent chirality with sizable shifts in Little-Parks oscillations. Furthermore, the critical temperature of the loop is also magnetization-orientation-dependent and conversely, the superconducting transition itself may influence the magnetization direction. More generally, the superconducting region above the FI serves as a "phase battery" and so offers a new device concept for superconducting spintronics.< Réduire

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Chirality-controlled spontaneous currents in spin-orbit coupled superconducting rings

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