Supercurrent-induced charge-spin conversion in spin-split superconductors

Faluke Aikebaier; Mihail A. Silaev; T. T. Heikkilä

doi:10.1103/PhysRevB.98.024516

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Supercurrent-induced charge-spin conversion in spin-split superconductors

Faluke Aikebaier, Mihail A. Silaev, T. T. Heikkilä

DOI 10.1103/PhysRevB.98.024516 · Physical Review B

T1

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Abstract

We study spin-polarized quasiparticle transport in a mesoscopic superconductor with a spin-splitting field in the presence of coflowing 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, which 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.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown