Enhanced spin accumulation in a superconductor

Spin-Valve Effect of the Spin Accumulation Resistance in a Double Ferromagnet - Superconductor Junction

Spin-flip Enhanced Thermoelectricity in Superconductor-Ferromagnet Bilayers

We study the effects of Zeeman-splitting and spin-flip scattering in a superconductor (S) on the thermoelectric properties of a tunneling contact to a metallic ferromagnet (F) using the Green’s function method. A giant thermopower has been theoretically predicted and experimentally observed in such structures. This huge thermoelectric effect is attributed to the spin-dependent particle-hole asy...

Phase and spin dynamics in a superconductor/ferromagnet/superconductor junction

We study a phase dynamics induced by a spin dynamics in a ferromagnetic Josephson junction, in which two superconductors (SC’s) are separated by a ferromagnetic layer. A new phenomenological model for the phase variable is proposed by including the spin dynamics excited by the ferromagnetic resonance (FMR) in the gauge invariant phase of s-wave SC’s. We found that the current-voltage characteri...

Clocked single-spin source based on a spin-split superconductor

Wepropose an accurate clocked single-spin source for ac-spintronic applications. Our device consists of a superconducting island covered by a ferromagnetic insulator (FI) layer throughwhich it is coupled to superconducting leads. Single-particle transfer relies on the energy gaps and the islandʼs charging energy, and is enabled by a bias and a time-periodic gate voltage. Accurate spin transfer ...

Spin injection into a superconductor with strong spin-orbit coupling.

We demonstrate spin injection into superconducting Nb by employing a spin absorption technique in lateral spin valve structures. Spin currents flowing in a nonmagnetic Cu channel are preferably absorbed into Nb due to its strong spin-orbit interaction, the amount of which dramatically changes below or above the superconducting critical temperature (TC). The charge imbalance effect observed in t...