We investigate the electronic transport in a quantum wire with localized
Rashba interaction. The Rashba field forms quasi-bound states which couple to
the continuum states with an opposite spin direction. The presence of this
Rashba dot causes Fano-like antiresonances and dips in the wire's linear
conductance. The Fano lineshape arises from the interference between the direct
transmission channel along the wire and the hopping through the Rashba dot. Due
to the confinement, we predict the observation of large charging energies in
the local Rashba region which lead to Coulomb-blockade effects in the transport
properties of the wire. Importantly, the Kondo regime can be achieved with a
proper tuning of the Rashba interaction, giving rise to an oscillating linear
conductance for a fixed occupation of the Rashba dot.Comment: 6 pages, 3 figures; presentation improved, discussions extended.
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