Fem for Schrodinger equation with Rashba effect

摘要

A finite element method for treating two-dimensional electron systems with Rashba spin-orbit interaction is developed. The Rashba spin-orbit interaction removes spin degeneracy, so that each spin contributes to the conductance differently. By accounting for-the connection between a system and leads, this method yields the conductance of a nanoscale quantum device for each spin state. As an example, this calculation method is applied to a model of a quantum point contact. The results of this calculation indicate conductance quantization and a large spin polarization. We discuss the estimated accuracies of this calculation. (C) 2007 Elsevier B.V. All rights reserved.