Jing Ma and X. L. Lei 2004 Europhys. Lett. 67 432 doi:10.1209/epl/i2004-10079-7
Jing Ma and X. L. Lei
Show affiliationsWe investigate the linear and nonlinear dc transport through an interacting quantum dot connected to two ferromagnetic electrodes around Kondo regime with spin-flip scattering in the dot. Using a slave-boson mean-field approach for the Anderson Hamiltonian having finite on-site Coulomb repulsion, we find that a spin-flip scattering always depresses the Kondo correlation at arbitrary polarization strength in both parallel and antiparallel alignment of the lead magnetization and that it effectively reinforces the tunneling-related conductance in the antiparallel configuration. For systems deep in the Kondo regime, the zero-bias single Kondo peak in the differential conductance is split into two peaks by the intradot spin-flip scattering; while for systems somewhat further from the Kondo center, the spin-flip process in the dot may turn the zero-bias anomaly into a three-peak structure.
Issue 3 (August 2004)
Received 6 March 2004, accepted for publication 25 May 2004, in final form 25 May 2004
Jing Ma and X. L. Lei 2004 Europhys. Lett. 67 432
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