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.
Reference: Khadka, Durga, et al. "Kondo physics in antiferromagnetic Weyl semimetal Mn3+xSn1−x films." Science advances 6.35 (2020): eabc1977.
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Presenters
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Xingyue Han
University of Pennsylvania, Department of Physics and Astronomy, University of Pennsylvania
Authors
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Xingyue Han
University of Pennsylvania, Department of Physics and Astronomy, University of Pennsylvania
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Durga Khadka
University of Miami
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Tilak Ram Thapaliya
University of Miami
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Sunxiang Huang
University of Miami
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Liang Wu
University of Pennsylvania, Department of Physics and Astronomy, University of Pennsylvania