On the question of short-period oscillations of the collector voltage during transverse electron focusing

Giant short-period oscillations during transverse electron focusing at high emitter voltages have been observed in bismuth samples with a superlattice on the surface. A model is proposed which explains the onset of the oscill ations, their position on the magnetic-field scale, and their intensificati on and shift along the magnetic-field scale with increasing current (this s hift depending on the direction of current flow) and which can also account for the absence of oscillations in fields which are multiples of the field of the first oscillation. In this model the oscillations are attributed to the appearance of resonant surface (edge) states and their contribution to the electron transport. (C) 1998 American Institute of Physics. [S0021-364 0(98)00724-5].