Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-02-06
Phys. Rev. Lett. 90, 116602 (2003)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 3 figures, to be published in Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.90.116602
We investigate the nonequilibrum transport properties of a quantum dot when spin flip processes compete with the formation of a Kondo resonance in the presence of ferromagnetic leads. Based upon the Anderson Hamiltonian in the strongly interacting limit, we predict a splitting of the differential conductance when the spin flip scattering amplitude is of the order of the Kondo temperature. We discuss how the relative orientation of the lead magnetizations strongly influences the electronic current and the shot noise in a nontrivial way. Furthermore, we find that the zero-bias tunneling magnetoresistance becomes negative with increasing spin flip scattering amplitude.
Lopez Rosa
Sanchez David
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