Magnetic-field-dependent self-consistent electronic structure of an inversion layer in the two-subband state.

Abstract

An electron inversion layer with two populated electric subbands at zero magnetic field is considered in a perpendicular quantizing magnetic field. The band bending in the direction of the magnetic field depends on the latter via the occupation of the Landau levels according to their ordering and to their degeneration. Full self-consistent calculations are performed taking properly into account this effect for the first time. It is shown that qualitatively new features of the Landau-level spectrum and of the subband occupation appear. Most important is the occurrence of finite magnetic field regions where two Landau levels coincide and where both of these levels are partially occupied.