Supercurrent Induced Charge-Spin Conversion in Spin-Split Superconductors

Abstract

We study spin-polarized quasiparticle transport in a mesoscopic superconductor with a spin- splitting field in the presence of co-flowing supercurrent. In such a system, the nonequilibrium state is characterized by charge, spin, energy and spin energy modes. Here we show that in the presence of both spin splitting and supercurrent, all these modes are mutually coupled. As a result, the supercurrent can convert charge imbalance, that in the presence of spin splitting decays on a relatively short scale, to a long-range spin accumulation decaying only via inelastic scattering. This effect enables coherent charge-spin conversion controllable by a magnetic flux, and it can be detected by studying different symmetry components of the nonlocal conductance signal.

11 pages, 5 figures

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Cited by in corpus (13)

• Thermal, electric and spin transport in superconductor/ferromagnetic-insulator structures
• Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
• Giant transition-state enhancement of quasiparticle spin-Hall effect in an exchange-spin-split superconductor detected by non-local magnon spin-transport
• Voltage-induced thin-film superconductivity in high magnetic fields
• Dynamics of two ferromagnetic insulators coupled by superconducting spin current
• Thermally induced spin-transfer torques in superconductor/ferromagnet bilayers
• Flux flow spin Hall effect in type-II superconductors with spin-splitting field
• Spin currents driven by the Higgs mode in magnetic superconductors
• Controlling spin supercurrents via nonequilibrium spin injection
• Voltage control of superconducting exchange interaction and anomalous Josephson effect
• Spin-dependent coupling of supercurrent and nonequilibrium quasiparticles in high-field superconductors
• Spin accumulation induced by a singlet supercurrent
• Evidence for spin-dependent energy transport in a superconductor