EVALUATING DOT-LEAD COUPLING IN A NONPARABOLIC QUANTUM DOT CONNECTED TO TWO CONDUCTING LEADS

Abstract

By considering excitons in a semiconductor nonparabolic quantum dot as hydrogen-atom-like quasi-particles confined in a spherical quantum box, the dot being connected to two semi-infinite conducting leads, we propose a theoretical-analytical approach by which the maximal dot-lead coupling energy is calculated in terms of the maximum Fermi velocity. In addition, numerical computations consistent with the above approach are carried out. Our results constitute a deep insight into the state of the art and agree with experimental data.