Acoustic phonons mediated non-equilibrium spin current in the presence of Rashba and Dresselhaus spin-orbit couplings

TL;DR

This paper investigates how acoustic phonons influence non-equilibrium spin currents in a 2D electron gas with Rashba and Dresselhaus spin-orbit couplings, revealing non-vanishing spin currents and phonon effects on spin accumulation.

Contribution

It demonstrates that electron-phonon interactions prevent the spin current from vanishing and affect spin accumulation, extending understanding of spin transport in spin-orbit coupled systems.

Findings

Spin current does not vanish at any spin-orbit coupling value.

Electron-phonon coupling influences spin accumulation.

Non-zero spin currents persist due to phonon interactions.

Abstract

The influence of the electrons interaction with longitudinal acoustic phonons on magnetoeletric and spin-related transport effects are investigated. The physical system under consideration has been assumed to be a two dimensional electron gas system with both Rashba and Dreesselhaus spin-orbit couplings. In the works which have been previously performed in this field it has been shown that in the non-equilibrium regime, the Rashba and Dreesselhaus couplings can not be responsible for spin-current where in the absence of other interactions such as lattice vibrations identically vanishes. In the current work we have employed a semi-classical method by using the Boltzmann approach. It was shown that the spin-current of the system, in general, does not go all the way to zero at any value of the spin-orbit couplings. It was also shown that the spin accumulation of the system can be influenced by the electron-phonon coupling.