Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads: A Numerical Renormalization Group Analysis

Mahn Soo Choi, David Sánchez, Rosa López

Research output: Contribution to journalArticle

14 Citations (Scopus)

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 languageEnglish
Number of pages1
JournalPhysical review letters
Volume92
Issue number5
DOIs
Publication statusPublished - 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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