2013/08/01 by Noriyuki Nakabayashi, Gen Tatara · 18 citations
Physics and Astronomy · #Coupling (piping) #Electromagnetic field #Magnetic field #Magnetic properties of thin films #Magnetization #Quantum and electron transport phenomena #Relaxation (psychology) #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · open access · doi:10.1088/1367-2630/16/1/015016
published in New Journal of Physics 16(1), 015016 (IOP Publishing) · 15pages, 5figures
arxiv created 2013/08/01 · openalex publication_date 2014/01/10 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Spin electromagnetic fields driven by the Rashba spin–orbit interaction, or Rashba-induced spin Berry's phase, in ferromagnetic metals are theoretically studied using the Keldysh Green's function method. Considering the limit of strong sd coupling without spin relaxation (adiabatic limit), the spin electric and magnetic fields are determined by calculating transport properties. The spin electromagnetic fields can be expressed in terms of a Rashba-induced effective vector potential, and thus they satisfy Maxwell's equation. In contrast to the conventional spin Berry's phase, the Rashba-induced one is linear in the gradient of magnetization profile, and thus can be extremely large even for slowly varying structures. We show that the Rashba-induced spin Berry's phase exerts a Lorentz force on spin resulting in a giant spin Hall effect in magnetic thin films in the presence of magnetization structures. A Rashba-induced spin magnetic field would be useful to distinguish between topologically equivalent magnetic structures. We propose experimental setups where a Rashba-induced spin magnetic field is identified.