ELECTRON DRAG BY SOLITONS IN SUPERLATTICES IN AN EXTERNAL MAGNETIC-FIELD

The soliton-electric effect accompanying the propagation of an electro magnetic soliton along an axis of a superlattice in an external magnet ic field directed along the magnetic field of the soliton is studied. It is assumed that the duration gamma(-1) of the soliton pulse is much shorter than the free flight time of an electron. It is shown that in the absence of a constant magnetic field the drag current varies as s in(alpha sech(2) gamma t) (alpha is a constant determined by the param eters of the superlattice). In the presence of a constant magnetic fie ld of intensity H-0 much greater than H-s, where H-s is the amplitude of the soliton field, the drag current oscillates. (C) 1996 American I nstitute of Physics.