TY - JOUR
T1 - Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads
T2 - A Numerical Renormalization Group Analysis
AU - Choi, Mahn Soo
AU - Sánchez, David
AU - López, Rosa
PY - 2004
Y1 - 2004
N2 - We investigate the effects of spin-polarized leads on the Kondo physics of a quantum dot using the numerical renormalization group method. Our study demonstrates in an unambiguous way that the Kondo effect is not necessarily suppressed by the lead polarization: While the Kondo effect is quenched for the asymmetric Anderson model, it survives even for finite polarizations in the regime where charge fluctuations are negligible. We propose the linear tunneling magnetoresistance as an experimental signature of these behaviors. We also report on the influence of spin-flip processes.
AB - We investigate the effects of spin-polarized leads on the Kondo physics of a quantum dot using the numerical renormalization group method. Our study demonstrates in an unambiguous way that the Kondo effect is not necessarily suppressed by the lead polarization: While the Kondo effect is quenched for the asymmetric Anderson model, it survives even for finite polarizations in the regime where charge fluctuations are negligible. We propose the linear tunneling magnetoresistance as an experimental signature of these behaviors. We also report on the influence of spin-flip processes.
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U2 - 10.1103/PhysRevLett.92.056601
DO - 10.1103/PhysRevLett.92.056601
M3 - Article
AN - SCOPUS:84873319167
VL - 92
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 5
ER -