Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.227201
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Funding
- NSF-DMR [0908029]
- Swiss NSF QC2 Visitor Program at the University of Basel
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [908026] Funding Source: National Science Foundation
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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 by standing waves confined by an in-plane profile of the spin-orbit splitting.
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