Generation of spin current by Coulomb drag

TL;DR

This paper demonstrates how magnetic fields can induce spin currents via Coulomb drag in quantum wires by compensating electronic density mismatches, enabling charge-to-spin current conversion.

Contribution

It introduces a novel mechanism for generating spin currents through Coulomb drag enhanced by magnetic field tuning in quantum wires.

Findings

Magnetic fields can compensate density mismatch in quantum wires.

Enhanced Coulomb drag facilitates charge-to-spin current conversion.

Spin current generation is sensitive to electronic density and magnetic field.

Abstract

Coulomb drag between two quantum wires is exponentially sensitive to the mismatch of their electronic densities. The application of a magnetic field can compensate this mismatch for electrons of opposite spin directions in different wires. The resulting enhanced momentum transfer leads to the conversion of the charge current in the active wire to the spin current in the passive wire.