Quantum kinetic theory of current-induced torques in Rashba ferromagnets
Quantum kinetic theory of current-induced torques in Rashba ferromagnets
Motivated by recent experimental studies of thin-film devices containing a single ferromagnetic layer, we develop a quantum kinetic theory of current-induced magnetic torques in Rashba-model ferromagnets. We find that the current-induced spin densities, responsible for the switching behavior, are due most essentially to spin-dependent quasiparticle lifetimes and derive analytic expressions …