Spin Resonance and dc Current Generation in a Quantum Wire

TL;DR

This paper demonstrates that spin-orbit interaction in a quantum wire causes a narrow spin resonance at low temperatures, which can be enhanced by a weak magnetic field and results in dynamic magnetization and spin currents.

Contribution

It reveals a novel low-temperature spin resonance in quantum wires induced by spin-orbit interaction without external magnetic fields.

Findings

Resonance is narrow and occurs at low temperatures.

Weak magnetic fields significantly enhance resonance absorption.

Resonance radiation induces magnetization and spin currents.

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. A relatively weak dc magnetic field of a definite direction strongly increases the resonance absorption. Linearly polarized resonance radiation produces dynamic magnetization as well as electric and spin currents. The effect strongly depends on the external magnetic field.