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arXiv · 1209.1647

Chiral Spin Waves in Fermi Liquids with Spin-Orbit Coupling

Ali Ashrafi·Dmitrii L. Maslov
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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.

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Ali Ashrafi, Dmitrii L. Maslov. 2012-09-07. Chiral Spin Waves in Fermi Liquids with Spin-Orbit Coupling. https://doi.org/10.1103/physrevlett.109.227201

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