Magnetotunnelling in resonant tunnelling structures with spin-orbit   interaction
  Magnetotunnelling spectroscopy of resonant tunnelling structures provides information on the nature of the two-dimensional electron gas in the well. We describe a model based on nonequilibrium Green's functions that allows for a comprehensive study of the density of states, tunnelling currents and current spin polarization. The investigated effects include the electron-phonon interaction, interface roughness scattering, Zeeman effect and the Rashba spin-orbit interaction. A qualitative agreement with experimental data is found regarding the satellite peaks. The spin polarization is predicted to be larger than ten percent for magnetic fields above 2 Tesla and having a structure even at the satellite peaks. The Rashba effect is confirmed to be observable as a beating pattern in the density of states but found to be too small to affect the tunnelling current. 
Goran Isi\'c, Dragan Indjin, Vitomir Milanovi\'c, Jelena   Radovanovi\'c, Zoran Ikoni\'c, Paul Harrison
cond-mat.mes-hall