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Spin precession in spin‐polarized transport through an interacting quantum dot
Author(s) -
Rudziński W.,
Barnaś J.,
Świrkowicz R.,
Wilczyński M.
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200460064
Subject(s) - quantum dot , condensed matter physics , precession , spin (aerodynamics) , physics , ferromagnetism , magnetic field , conductance , electrode , non equilibrium thermodynamics , quantum mechanics , thermodynamics
Spin‐polarized transport through an interacting single‐level quantum dot coupled to two ferromagnetic leads with non‐collinear magnetizations is analyzed theoretically by means of the nonequilibrium Green function technique. We show that spin precession on the dot, which arises due to an effective exchange field originating from the interaction between the dot and external electrodes, may lead to negative differential conductance. Our results also prove that the diode‐like behavior in asymmetrical junctions with one electrode being half‐metallic is partially suppressed when magnetic moments of the electrodes become non‐collinear. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)