Thermomagnetic effect in a two-dimensional electron system with an asymmetric quantizing potential

In a two-dimensional electron gas (2DEG) in GaAs/AlGaAs heterojunction an e lectromotive force (EMF) was experimentally observed in the presence of a m agnetic field parallel to the 2DEG plane and in the presence of a heating o f the DEC with respect to the crystal lattice. The origin of this effect is the asymmetric quantizing potential of heterojunctions in the presence of a magnetic field which leads to an asymmetrical electron energy spectrum in the plane of 2DEG in the direction perpendicular to the magnetic field. Th e asymmetry of the electron energy spectrum leads to an asymmetrical electr on-phonon interaction which results in the appearance of the EMF investigat ed. The value of the measured EMF is in agreement with theoretical estimati ons.