# DC spin generation by junctions with AC driven spin-orbit interaction

## TL;DR

This paper demonstrates that an AC-driven Rashba spin-orbit interaction in a one-dimensional junction can generate a DC spin polarization, with the polarization components depending on the electric field's polarization and frequency.

## Contribution

It introduces a novel mechanism for DC spin generation using AC-driven spin-orbit coupling in a weak link, highlighting the role of electric field polarization and frequency.

## Key findings

- DC spin polarization is generated by AC-driven Rashba interaction.
- The polarization has a DC component and a rotating transverse component.
- The DC component vanishes with linear polarization.

## Abstract

An unbiased one-dimensional weak link between two terminals, subjected to the Rashba spin-orbit interaction caused by an AC electric field which rotates periodically in the plane perpendicular to the link, is shown to inject spin-polarized electrons into the terminals. The injected spin-polarization has a DC component along the link and a rotating transverse component in the perpendicular plane. In the adiabatic, low rotation-frequency regime, these polarization components are proportional to the frequency. The DC component of the polarization vanishes for a linearly-polarized electric field.