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arXiv · 1102.0457

Interference of Fano-Rashba conductance dips

A. Renart·M. M. Gelabert·L. Serra
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Abstract

We study the interference of two tunable Rashba regions in a quantum wire with one propagating mode. The transmission dips (Fano-Rashba dips) of the two regions either cross or anti cross depending on the distance between the two regions. For large separations we find Fabry-Pérot oscillations due to the interference of forwards and backwards propagating modes. At small separations overlapping evanescent modes play a prominent role, leading to an enhanced transmission and destroying the conductance dip. Analytical expressions in scattering-matrix theory are given and the relevance of the interference effect in a device is discussed.

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A. Renart, M. M. Gelabert, L. Serra. 2011-02-02. Interference of Fano-Rashba conductance dips. https://doi.org/10.1088/0953-8984%2F23%2F11%2F115301

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