Chiral Spin Waves in Fermi Liquids with Spin-Orbit Coupling
Abstract
We predict the existence of chiral spin waves collective modes in a two-dimensional Fermi liquid with the Rashba or Dresselhaus spin-orbit coupling. Starting from the phenomenological Landau theory, we show that the long-wavelength dynamics of magnetization is governed by the Klein- Gordon equations. The standing-wave solutions of these equations describe "particles" with effective masses, whose magnitudes and signs depend on the strength of the electron-electron interaction. The spectrum of the spin-chiral modes for arbitrary wavelengths is determined from the Dyson equation for the interaction vertex. We propose to observe spin-chiral modes via microwave absorption of standing waves confined by an in-plane profile of the spin-orbit splitting.
Cite
@article{arxiv.1209.1647,
title = {Chiral Spin Waves in Fermi Liquids with Spin-Orbit Coupling},
author = {Ali Ashrafi and Dmitrii L. Maslov},
journal= {arXiv preprint arXiv:1209.1647},
year = {2015}
}