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Fano-Rashba effect in a quantum wire

AuthorsSánchez, David ; Serra, Llorenç
KeywordsElectron spin polarisation
Semiconductor quantum wires
Spin-orbit interactions
Bound states
Conduction bands
Issue Date27-Oct-2006
PublisherAmerican Physical Society
CitationPhysical Review B 74, 153313 (2006)
AbstractWe predict the occurrence of Fano line shapes 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 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.
Description4 pages.-- PACS numbers: 73.63.Nm, 72.25.Dc, 71.70.Ej.-- Final full-text version of the paper available at: http://dx.doi.org/10.1103/PhysRevB.74.153313.
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