HIGH-QUALITY RESONANT-TUNNELING THROUGH A RANDOM MULTIBARRIER SUPERLATTICE

The transmission of electrons through a random array of a number of id entical multibarriers has been studied. Although most of the electrons are reflected by such a random structure, there still exist electrons with special energies which are completely unscattered. This produces a high-quality resonant tunneling with a peak transmission coefficien t much narrower than that of the tunneling through a single double bar rier. The current-voltage characteristics of this structure are calcul ated and the special negative differential conductivity is exhibited.