Spin-dependent (magneto)transport through a ring due to spin-orbit interaction

Details Spin-dependent (magneto)transport through a ring due to spin-orbit interaction Spin-dependent (magneto)transport through a ring due to spin-orbit interaction

2004-07-20

arxiv.org/abs/cond-mat/0407540v1

Phys. Rev. B 69, 155335 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

19 pages, 9 figures

Scientific paper

10.1103/PhysRevB.69.155335

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 et al. [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.

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