We study the effect of electron–electron interactions on the resonant– tunneling spectroscopy of the localized states in a barrier. Using a simple model of three localized states, we show that, due to the Coulomb interactions , a single state can give rise to two resonant peaks in the conductance as a function of gate voltage, G(V g). We also demonstrate that an additional higher–order resonanc...

By use of the scattering matrix method, we investigate the coupling effects of layers on spinpolarized transport through semimagnetic semiconductor heterostructures with triple paramagnetic layers. Due to the coupling between double non-magnetic layers or among triple paramagnetic layers, spin tunneling exhibits interesting and complex features, which are determined by the structural configurat...

Quantum electronic devices such as resonant tunneling diodes and transistors are now beginning to be used in ultrafast and compact circuit designs. These devices exhibit negative differential resistance (NDR) and/or negative transconductance in their I-V characteristics and have active dimensions of a few nanometers. Since the conventional drift-diffusion approximation is not valid for simulati...