Spin resolved conductance in semiconductor mesoscopic rings: not spin gate response

摘要

Based on the equilibrium Green's function formalism, we study the spin resolved conductance in a semiconductor mesoscopic ring when it bridges two source and drain electrodes. Effects of Rashba spin-orbit interaction (RSOI) and Dresselhaus spin-orbit interaction (DSOI) on the spin transport is taken into account. It is shown that complete spin inversion can occur in the presence of RSOI and/ or DSOI and in the absence of applied magnetic field threading the ring. Results of this study can be used to designing a perfect not spin gate or spin inverter. We have also investigated the effects of a tunnel barrier and of asymmetric relative positions of incoming and outgoing electrodes on the spin resolved conductance and spin inversion effect.