Abstract
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.
| Original language | English |
|---|---|
| Number of pages | 1 |
| Journal | Physical Review Letters |
| Volume | 92 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2004 Jan 1 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads : A Numerical Renormalization Group Analysis. / Choi, Mahn-Soo; Sánchez, David; López, Rosa.
In: Physical Review Letters, Vol. 92, No. 5, 01.01.2004.Research output: Contribution to journal › Article
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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 - 2004/1/1
Y1 - 2004/1/1
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.
UR - http://www.scopus.com/inward/record.url?scp=84873319167&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873319167&partnerID=8YFLogxK
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 -