The Fano-Rashba effect

Details The Fano-Rashba effect The Fano-Rashba effect

2006-10-05

arxiv.org/abs/cond-mat/0610147v1

J. Phys.: Conf. Ser. 61, 1037-1041 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, proceedings of ICN+T 2006 (Basel, Switzerland, 30/7-4/9), accepted, to appear in J. Phys.: Conf. Ser

Scientific paper

10.1088/1742-6596/61/1/205

We analyze the linear conductance of a semiconductor quantum wire containing a region where a local Rashba spin-orbit interaction is present. We show that Fano lineshapes appear in the conductance due to the formation of quasi bound states which interfere with the direct transmission along the wire, a mechanism that we term the Fano-Rashba effect. We obtain the numerical solution of the full Schr\"odinger equation using the quantum-transmitting-boundary method. The theoretical analysis is performed using the coupled-channel model, finding an analytical solution by ansatz. The complete numerical solution of the coupled-channel equations is also discussed, showing the validity of the ansatz approach.

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