2006/02/28 by Mikhail Pletyukhov, M. Pletyukhov, V. Gritsev +1 · 3 citations
Chemistry · Engineering · Physics and Astronomy · #Chemistry #Computational physics #Condensed matter physics #Coupling (piping) #Electron #Fermi gas #Materials science #Orbit (dynamics) #Physics #Physics of Superconductivity and Magnetism #Plasmon #Polarization (electrochemistry) #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Quasiparticle #Random phase approximation #Scattering #Semiconductor materials and devices #Spin–orbit interaction #Superconductivity #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.74.045307
published as Phys. Rev. B 74, 045307 (2006) · 15 pages, 10 figures, extended version of cond-mat/0506227
openalex publication_date 2006/07/12 · arxiv created 2006/09/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study screening properties of the two-dimensional electron gas with Rashba spin-orbit coupling. Calculating the dielectric function within the random phase approximation, we describe the new features of screening induced by spin-orbit coupling, which are the extension of the region of particle-hole excitations and the spin-orbit-induced suppression of collective modes. The required polarization operator is calculated in an analytic form without any approximations. Carefully deriving its static limit, we prove the absence of a small-q anomaly at zero frequency. On the basis of our results at finite frequencies we establish the new boundaries of the particle-hole continuum and calculate the SO-induced lifetime of collective modes such as plasmons and longitudinal optical phonons. According to our estimates, these effects can be resolved in inelastic Raman scattering. We evaluate the experimentally measurable dynamic structure factor and establish the range of parameters where the described phenomena are mostly pronounced.