Spin-dependent magnetotransport through a ring due to spin-orbit interaction -: art. no. 155335

Electron transport through a one-dimensional ring connected with two external leads, in the presence of spin-orbit interaction (SOI) of strength alpha and a perpendicular magnetic field is studied. Applying Griffith's boundary conditions we derive analytic expressions for the reflection and transmission coefficients of the corresponding one-electron scattering problem. We generalize earlier conductance results by Nitta [Appl. Phys. Lett. 75, 695 (1999)] and investigate the influence of alpha, temperature, and a weak magnetic field on the conductance. Varying alpha and temperature changes the position of the minima and maxima of the magnetic-field dependent conductance, and it may even convert a maximum into a minimum and vice versa.