Fano-Rashba effect in a quantum wire

Abstract

We predict the occurrence of Fano lineshapes in a semiconductor quantum wire with local spin-orbit (Rashba) coupling. We show that the Rashba interaction acts in a strictly one dimensional channel as an attractive impurity, leading to the formation of purely bound states. In a quasi-one dimensional system these bound states couple to the conduction ones through the Rashba intersubband mixing, giving rise to pronounced dips in the linear conductance plateaus. We give exact numerical results and propose an approximate model capturing the main ingredients of the effect.

5 pages, 3 figures

References in corpus (2)

• Electronic and spin properties of Rashba billiards
• A state with negative binding energy induced by coherent transport in a quantum wire

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