ELECTRON-NUMBER STATISTICS AND SHOT-NOISE SUPPRESSION BY COULOMB CORRELATION IN NONDEGENERATE BALLISTIC TRANSPORT

Within a Monte Carlo simulation, we investigate the statistical proper ties of an electron flow injected with a Poissonian distribution and t ransmitted under ballistic regime in the presence of long-range Coulom b interaction. Electrons are shown to exhibit a motional squeezing whi ch tends to space them more regularly rather than strictly at random, and to evidence a sub-Poissonian statistics with a substantially reduc ed Fano factor F-n much less than 1. The temporal (anti) correlation a mong carriers is demonstrated to be a collective effect which persists over the transit of several successive electrons. and results in a co nsiderable (more than one order of magnitude) shot-noise suppression.