MAGNETOTRANSPORT IN A SEMICONDUCTOR SUPERLATTICE WITH TRANSVERSE MAGNETIC-FIELD

Magnetotransport in a semiconductor superlattice (SL) under transverse magnetic field has been investigated. It is shown that in weak magnet ic and electric fields there is negative magnetoresistivity along the SL layers and positive magnetoresistivity along the SL axis. The Hall resistivity is much less than the usual semiconductor value. With an i ncrease of electric field, there appears a negative differential condu ctivity (NDC) along the SL layers, and the Hall voltage depends nonlin early on current density. In higher electric field, destroying the min iband structure, the magnetoresistivity along the SL axis is negative. The magnetoresistivity along the SL axis in strong magnetic field is positive for any current density. The Hall resistivity in strong magne tic (electric) field equals the classical value.