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

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

2011-10-17

arxiv.org/abs/1110.3667v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

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 found out that the electron-phonon interaction can not be considered as a underestimate effect on spin-dependent mechanisms. It was demonstrated that at low electron-phonon coupling strengths the lattice vibrations are more effective. 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.

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