Analytical model for molecular-scale charge transport

We demonstrate a simple analytical model for elastic charge transport on the nanometer scale within a single molecule. It is based on the assumptions usually employed for quantum chemical calculations, except that of equilibrium between the currents flowing in opposite directions. It allows the possibility of a nonuniform potential distribution and imbalance between the population of states of opposite momentum. We analyze two implementable configurations and find the predictions to be consistent with recent experimental results.