2015/01/31 by Daisuke Maruyama, Youichi Yanase
Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Electron #Electronic correlation #Materials science #Perturbation theory (quantum mechanics) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Renormalization #Spin (aerodynamics) #Spin–orbit interaction #Superconductivity #cond-mat.str-el
paper · pdf · doi:10.7566/jpsj.84.074702
published as J. Phys. Soc. Jpn. 84, 074702 (2015)
openalex publication_date 2015/06/08 · arxiv created 2015/06/11 · arxiv updated 2015/06/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The two-dimensional Rashba-Hubbard model is investigated in order to clarify the electron correlation effects in non-centrosymmetric metals. The renormalization effect on Rashba spin-orbit coupling (RSOC) is calculated on the basis of second-order and third-order perturbation theories. We show that RSOC is enhanced by the electron correlation. On the other hand, the spin-splitting of the Fermi momentum (SFM) is robust against the electron correlation effect because the enhancement of RSOC is cancelled by the k-mass renormalization. The cancellation is almost perfect in often adopted models in which the momentum dependence of RSOC is linear in the quasiparticle velocity. A small correction to the SFM appears otherwise. We show that the same results are obtained for other antisymmetric spin-orbit couplings in non-centrosymmetric systems, such as the synthetic spin-orbit coupling in cold atoms.