Kondo effect in transport through Aharonov-Bohm and Aharonov-Casher interferometers

Details Kondo effect in transport through Aharonov-Bohm and Aharonov-Casher interferometers Kondo effect in transport through Aharonov-Bohm and Aharonov-Casher interferometers

2009-02-12

arxiv.org/abs/0902.2200v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 4 figures, presented at SCES2008, Buzios, Brasil

Scientific paper

We derive the extension of the Hubbard model to include Rashba spin-orbit coupling that correctly describes Aharonov-Bohm and Aharonov-Casher phases in a ring under applied magnetic and electric fields. When the ring is connected to conducting leads, we develop a formalism that is able to describe both, Kondo and interference effects. We find that in the Kondo regime, the spin-orbit coupling reduces strongly the conductance from the unitary limit. This effect in combination with the magnetic flux, can be used to produce spin polarized carriers.

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