Raman phonon spectra from CrI3 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.

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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