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 journalArticlepeer-review

    18 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
    Pages (from-to)4
    Number of pages1
    JournalPhysical review letters
    Volume92
    Issue number5
    DOIs
    Publication statusPublished - 2004

    ASJC Scopus subject areas

    • General Physics and Astronomy

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