ELECTRON TRANSMISSION IN INTERACTING QUANTUM RESONATORS

The quantum transport of electrons in a T-shaped waveguide structure i s investigated using the tight-binding model. We take into account ele ctron-electron interaction in the resonator region within the mean-hel d approximation. The scaling rule breaks down in the interacting syste m and the effect of the interaction is significant when the sample dim ensions become large compared to the effective Bohr radius of electron s. The nearly perfect reflection due to the transmission resonances is shifted to higher energy as the repulsive interaction is increased. T he interaction effect in the presence of short-range disorder is also examined. (C) 1995 American Institute of Physics.