Magneto-terahertz studies on the Kondo-Weyl Mn<sub>3+x</sub>Sn<sub>1-x</sub> films

ORAL

Abstract

Mn3Sn has attracted a lot of interests because it is an antiferromagnetic Weyl metal that shows a large anomalous Hall effect with vanishing net magnetization at room temperature. In this work, we study the doping dependece in epitaxial Mn3+xSn1-x films by time domain terahertz spectroscopy under a magnetic field up to 7T. We observe resonance enhanced Faraday rotation in samples with excess Mn doping, which provides a strong evidence of a gap opening due to the Kondo effect. We also measure the anomalous terahertz Faraday rotation as a function of temperature and obtain a phase diagram for this series of samples.

Reference: Khadka, Durga, et al. "Kondo physics in antiferromagnetic Weyl semimetal Mn3+xSn1−x films." Science advances 6.35 (2020): eabc1977.

*X.H. and L.W. acknowledge support by the Amy Research Office under the grant W911NF1910342.

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Presenters

  • Xingyue Han

    • University of Pennsylvania
    • Department of Physics and Astronomy, University of Pennsylvania

Authors

  • Xingyue Han

    • University of Pennsylvania
    • Department of Physics and Astronomy, University of Pennsylvania

  • Durga Khadka

    • University of Miami

  • Tilak Ram Thapaliya

    • University of Miami

  • Sunxiang Huang

    • University of Miami

  • Liang Wu

    • University of Pennsylvania
    • Department of Physics and Astronomy, University of Pennsylvania