SOME FEATURES OF THE HALL EFFECT IN A MANY-VALLEY SEMICONDUCTOR.

An analysis is made of the dependence of the Hall angle and of the conductivity of many-valley semiconductor on an external electric field in the case when the intervalley scattering time depends strongly (compared with all other quantities) on the heating power. At certain critical values of the magnetic field, the dependences considered here change basically from curves with minima to curves with maxima. Reversal of the magnetic field gives rise to a new state, i. e. , the conductivity and the Hall angle exhibit effects which are odd with respect to the magnetic field.