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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2019

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

Résumé

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.
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Dates et versions

hal-02140470 , version 1 (27-05-2019)

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J. Robinson, A. V Samokhvalov, Alexandre I. Buzdin. Chirality-controlled spontaneous currents in spin-orbit coupled superconducting rings. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2019, 99 (18), ⟨10.1103/PhysRevB.99.180501⟩. ⟨hal-02140470⟩

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