ABSTRACT
This chapter discusses the two of these terms: current-induced spin polarization and the inverse spin-galvanic effect. The experimental observation of current-induced spin polarization has given rise to extended theoretical studies of this phenomenon in various systems using various approaches and theoretical techniques. Searching for publications on current-induced spin polarization, one can be confused by the fact that several different names are used to describe it. Like current-induced spin polarization, spin-galvanic effect can also result from the precessional mechanism based on the asymmetry of the M. I.Dyakonov–V. I. Perel spin relaxation. Due to the fast relaxation of whole spin polarization in the bulk and the long spin lifetime of electrons, the photocurrent becomes spin polarized. A stationary state forms where the energy gain and the relaxation are balanced, resulting in a non-symmetric distribution of carriers in k-space yielding an electric current.
