Spin Transport in Normal Metal-Ising Superconductor Junction

TL;DR

This paper theoretically explores spin transport in normal metal-Ising superconductor junctions, revealing that Ising superconductors can support spin supercurrents via spin-triplet pairs, with implications for spintronics.

Contribution

It introduces the concept of spin superconductivity in Ising superconductors and analyzes the mechanisms of spin transport and conductance in such junctions.

Findings

Spin-triplet Cooper pairs enable spin supercurrents.

Equal-spin Andreev reflection and spin-flip reflection dominate transport.

Potential for long-distance dissipationless spin transport in spintronics.

Abstract

The combination of spin-orbit coupling and superconductivity induces unconventional spin-triplet correlation in Ising superconductors. We theoretically investigate the spin transport through a normal metal-Ising superconductor junction, showing that Ising superconductors also have the characteristic of spin superconductivity.Due to the existence of spin-triplet Cooper pairs, not only charge supercurrent but also spin supercurrent can transport in Ising superconductors.We analyze the transport process in the junction which is mainly contributed by the equal-spin Andreev reflection and spin-flip reflection, and calculate the spin conductance and the spin injection efficiency under different conditions.Our findings broaden the boundary of spin superconductivity and reveal the potential applications of Ising superconductors in spintronics, especially in controlled long-distance dissipationless spin transport.