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Linear and Nonlinear Optical Spectroscopy Studies of a Magnetic Weyl Semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>

ORAL

Abstract

Co3Sn2S2 has received immense popularity in the condensed matter physics community because it is both a promising candidate for a magnetic Weyl semimetal and a non-Bravais Kagome lattice ferromagnet. So far, a careful correlation between the surface and the bulk properties, including structural, magnetic, and electronic properties, has yet to be explored comprehensively. In this talk, we will present our selective studies of the surface and bulk properties by conducting optical rotational anisotropy experiments of second and third harmonic generations (S/THG), respectively, using near-infrared wavelength light. We will also use light polarization to distinguish between the magnetic and the structural/electronic contributions in both linear and nonlinear S/THG optical measurements. Finally, we will carefully track the temperature dependence of both the linear and nonlinear optical responses across the magnetic critical transition temperature.

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Presenters

  • Youngjun Ahn

    Physics, University of Michigan

Authors

  • Youngjun Ahn

    Physics, University of Michigan

  • Rachel Owen

    Physics, University of Michigan, University of Michigan, Physics Department, University of Michigan

  • Elizabeth Drueke

    Physics, University of Michigan, University of Michigan, Physics Department, University of Michigan

  • Kejian Qu

    Materials Science and Engineering, University of Tennessee

  • Rui Xue

    Physics and Astronomy, University of Tennessee, University of Tennessee, Materials Science and Engineering, University of Tennessee, Knoxville

  • David George Mandrus

    Materials Science and Technology Division, Oak Ridge National Labratory, Materials Science and Engineering, University of Tennessee, Department of Materials Science and Engineering, University of Tennessee, University of Tennessee, Department of Materials Science and Engineering, University of Tennessee Knoxville, Department of Materials Science & Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA, Oakridge National Laboratory, Materials Science and Engineering, University of Tennessee, Knoxville, Oak Ridge National Laboratory, University of Tennessee - Knoxville, Materials Science and Technology Division, Oak Ridge National Laboratory, Department of Physics, University of Tennessee Knoxville, Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Materials Science and Technology Division, Department of Materials Science, The University of Tennessee, University of Tennessee, Knoxville

  • Liuyan Zhao

    University of Michigan, Physics, University of Michigan, University of Michigan - Ann Arbor, Physics Department, University of Michigan