Giant Magneto-Oscillations of Electric-Field-Induced Spin Polarization in 2DEG

摘要

We consider a disordered two-dimensional electron gas with spin-orbitcoupling placed in a perpendicular magnetic field and calculate the magnitudeand direction of the electric-field-induced spin polarization. We find that instrong magnetic fields the polarization becomes an oscillatory function of themagnetic field and that the amplitude of these oscillations is parametricallylarger than the polarization at zero magnetic field. We show that the enhancedamplitude of the polarization is a consequence of strong electron-holeasymmetry in a quantizing magnetic field.