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Orbital two-channel Kondo effect in epitaxial ferromagnetic L10-MnAl films

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  • L. J. Zhu

    (State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences
    Institut für Physik, Martin-Luther-Universität Halle-Wittenberg)

  • S. H. Nie

    (State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences)

  • P. Xiong

    (Florida State University)

  • P. Schlottmann

    (Florida State University)

  • J. H. Zhao

    (State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences)

Abstract

The orbital two-channel Kondo effect displaying exotic non-Fermi liquid behaviour arises in the intricate scenario of two conduction electrons compensating a pseudo-spin-1/2 impurity of two-level system. Despite extensive efforts for several decades, no material system has been clearly identified to exhibit all three transport regimes characteristic of the two-channel Kondo effect in the same sample, leaving the interpretation of the experimental results a subject of debate. Here we present a transport study suggestive of a robust orbital two-channel Kondo effect in epitaxial ferromagnetic L10-MnAl films, as evidenced by a magnetic field-independent resistivity upturn with a clear transition from logarithmic- to square-root temperature dependence and deviation from it in three distinct temperature regimes. Our results also provide an experimental indication of the presence of two-channel Kondo physics in a ferromagnet, pointing to considerable robustness of the orbital two-channel Kondo effect even in the presence of spin polarization of the conduction electrons.

Suggested Citation

  • L. J. Zhu & S. H. Nie & P. Xiong & P. Schlottmann & J. H. Zhao, 2016. "Orbital two-channel Kondo effect in epitaxial ferromagnetic L10-MnAl films," Nature Communications, Nature, vol. 7(1), pages 1-7, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10817
    DOI: 10.1038/ncomms10817
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