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

Authors
Journal
Physica B Condensed Matter
0921-4526
Publisher
Elsevier
Publication Date
Volume
404
Issue
19
Identifiers
DOI: 10.1016/j.physb.2009.07.093
Keywords
  • Kondo Effect
  • Conductance
  • Spin-Orbit Coupling
  • Spintronics

Abstract

Abstract 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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