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Layer-dependent phonons in the magnetic topological insulator MnBi<sub>2</sub>Te<sub>4</sub>

ORAL

Abstract

We applied Raman spectroscopy to investigate lattice vibrational modes in the magnetic topological insulator MnBi2Te4 with thicknesses ranging from 1 to 5 septuple layers. We identified the symmetry of phonon modes based on polarization dependent measurements. Also, we observed thickness-dependent phonon modes at frequencies below 12cm-1. Temperature and magnetic field dependent measurements will be also discussed.

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Presenters

  • Jeongheon Choe

    Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin

Authors

  • Jeongheon Choe

    Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin

  • David Lujan

    Department of Physics, University of Texas at Austin, Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin, University of Texas at Austin

  • Martin Rodriguez-vega

    Physics, University of Texas at Austin, The University of Texas at Austin, Center for Dynamics and Control of Materials, University of Texas at Austin, University of Texas at Austin

  • Zhipeng Ye

    Texas Tech University, Department of Electrical and Computer Engineering, Texas Tech University

  • Jiamin Quan

    University of Texas at Austin, Department of Physics, The University of Texas at Austin, Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin

  • Aritz Leonardo

    Donostia International Physics Center, Paseo Manuel de Lardizabal 4

  • Timothy Nathan Nunley

    Department of Physics, University of Texas at Austin, Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin

  • Jiaqiang Yan

    Materials Science and Technology Division, Oak Ridge National Lab, Oak Ridge National Laboratory, University of Tennessee, Oak Ridge National Lab, Materials Science and Technology Division, Oak Ridge National Laboratory, Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Materials Science and Technology Division

  • Gregory Fiete

    Physics, Northeastern University, Northeastern University, Physics Department, Northeastern University, Department of Physics, Northeastern University

  • Rui He

    Texas Tech University, Department of Electrical and Computer Engineering, Texas Tech University

  • Xiaoqin (Elaine) Li

    University of Texas at Austin, Physics, University of Texas at Austin, Department of Physics, University of Texas at Austin, U.T. Austin, Department of Physics, The University of Texas at Austin, Department of Physics, Center of Complex Quantum Systems, University of Texas at Austin