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arXiv · 0806.2734

Magnetoconductance properties of rectangular arrays of spintronic quantum rings

Orsolya Kalman·Peter Foldi·Mihaly G. Benedict·Francois M. Peeters
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Abstract

Electron transport through multi-terminal rectangular arrays of quantum rings is studied in the presence of Rashba-type spin-orbit interaction (SOI) and of a perpendicular magnetic field. Using the analytic expressions for the transmission and reflection coefficients for single rings we obtain the conductance through such arrays as a function of the SOI strength, the magnetic flux, and of the wave vector $k$ of the incident electron. Due to destructive or constructive spin interferences caused by the SOI, the array can be totally opaque for certain ranges of $k$, while there are parameter values where it is completely transparent. Spin resolved transmission probabilities show nontrivial spin transformations at the outputs of the arrays. When point-like random scattering centers are placed between the rings, the Aharonov-Bohm peaks split, and an oscillatory behavior of the conductance emerges as a function of the SOI strength.

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Orsolya Kalman, Peter Foldi, Mihaly G. Benedict, Francois M. Peeters. 2008-06-17. Magnetoconductance properties of rectangular arrays of spintronic quantum rings. https://doi.org/10.1103/physrevb.78.125306

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