Electron localization at a heterojunction of the second kind
Baranov A. N. , Guseinov A. A. , Rogachev A. A., Titkov A. N., Cheban V. N., Yakovlev Yu. P.
A localization of photoelectrons has been observed in a 2D potential well at a heterojunction of the second kind in the /?-GaInAsSb-/?-GaSb system. The localization energy of the electrons in the well is shown to be determined by the level of doping of the narrow-gap layer; specifically, the localization energy increases with decreasing doping level. The filling of the well depends in a nonmonotonic way on the temperature, going through a maximum at 20-50 K. An external magnetic field directed parallel to the heterojunction strongly affects the filling of the wells.