Raman phonon spectra from CrI<sub>3</sub> atomic layers

ORAL

Abstract

CrI3 has recently been demonstrated to be an Ising ferromagnet whose magnetization retains even in a single monolayer below Curie temperature. Here we report our recent Raman studies on bulk and monolayer/few-layer CrI3. Temperature-dependent Raman studies are performed to scrutinize structural phase transition and magnetic phase transition. We determine the symmetries of the phonon modes using polarized Raman spectroscopy and first-principles theoretical calculations. Our results show that Raman selection rule no longer holds in degraded CrI3 samples.

*Supported by NSF CAREER Grants No. DMR-1760668, DMR- 1753054, and DMR-1749774.

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Presenters

  • Rui He

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

Authors

  • Rui He

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

  • Zhipeng Ye

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

  • Gaihua Ye

    • Texas Tech University

  • Eric S Wauer

    • Texas Tech University

  • Fabian S Diaz

    • Texas Tech University

  • David Tauzin

    • Texas Tech University

  • Hyun Ho Kim

    • University of Waterloo, Canada
    • University of Waterloo

  • Bowen Yang

    • University of Waterloo

  • Adam Tsen

    • University of Waterloo, Canada
    • University of Waterloo
    • Chemistry, University of Waterloo

  • Hua Wang

    • Department of Materials Science and Engineering, Texas A&M University
    • Texas A&M University

  • Xiaofeng Qian

    • Department of Materials Science and Engineering, Texas A&M University
    • Texas A&M University

  • Wencan Jin

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

  • Liuyan Zhao

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