Spin Resonance and dc Current Generation in a Quantum Wire

TL;DR

This paper demonstrates that spin-orbit interaction in a quantum wire induces a narrow spin resonance at low temperatures, enabling generation of dc spin currents and electric currents through resonance absorption without external magnetic fields.

Contribution

It reveals a novel spin resonance phenomenon in quantum wires caused by spin-orbit interaction, enabling control of spin and charge currents with polarized radiation.

Findings

Resonance occurs at low temperatures without magnetic fields.

Linearly polarized radiation generates dc spin currents.

Circularly polarized radiation induces dc electric currents or magnetization.

Abstract

We show that in a quantum wire the spin-orbit interaction leads to a narrow spin resonance at low temperatures, even in the absence of an external magnetic field. Resonance absorption by linearly polarized radiation gives a dc spin current; resonance absorption by circularly polarized radiation gives a dc electric current or magnetization.