Magnetic field- and temperature-dependent resonant Raman spectroscopy of bulk CrI<sub>3</sub>

ORAL

Abstract

The van der Waals magnet CrI3 has been thought to host ferromagnetism in its bulk form and interlayer antiferromagnetism in its few-layer form. The magnetic excitations in bulk CrI3 have been probed by inelastic neutron scattering, while those in CrI3 films have been studied with inelastic magneto-tunneling spectroscopy and Raman spectroscopy. Despite such intensive effort, it remains mysterious till now how the interlayer magnetism evolves from the ferromagnetic type in bulk to the antiferromagnetic one in thin films and what the low energy magnetic excitations are in CrI3. In this talk, we will present our results on temperature- and magnetic field-dependent resonant Raman spectroscopy studies on bulk CrI3. We will show our experimental evidences on the complex spin wave structures in bulk CrI3 and their intricate magnetic field dependence. We will further discuss the magnetic field dependence of phonons and explore the interplay between the lattice and the spin degrees of freedom in bulk CrI3.

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

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Presenters

  • Siwen Li

    • University of Michigan
    • Univ of Michigan - Ann Arbor

Authors

  • Siwen Li

    • University of Michigan
    • Univ of Michigan - Ann Arbor

  • Zhipeng Ye

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

  • Xiangpeng Luo

    • Peking University, China
    • Univ of Michigan - Ann Arbor

  • Gaihua Ye

    • Texas Tech University
    • Texas Tech Univ

  • Shangjie Tian

    • Renmin University of China

  • Hechang Lei

    • Brookhaven National Laboratory
    • Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China
    • Renmin University of China

  • Kai Sun

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

  • Rui He

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

  • Liuyan Zhao

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