Magnetic-Field-Induced Quantum Phase Transitions in bulk CrI<sub>3</sub>*

ORAL

Abstract

Using magnetic field and temperature dependent circularly polarized Raman spectroscopy of phonons and magnons (spin waves), we reveal a novel mixed state of layered AFM and FM in 3D CrI3 bulk crystals where the layered AFM survives in the surface layers and the FM appears in deeper bulk layers. We then show that the surface layered AFM transits into the FM at a critical magnetic field of 2 T, similar to what was found in the few layer case. Concurrent with this magnetic phase transition, we discover a first-order structural phase transition that alters the crystallographic point group from C3i (rhombohedral) to C2h (monoclinic). Our result reveals the intimate relationship between the layered AFM-to-FM and the crystalline rhombohedral-to-monoclinic phase transitions.

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

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Presenters

  • Gaihua Ye

    • Texas Tech University

Authors

  • Gaihua Ye

    • Texas Tech University

  • Zhipeng Ye

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

  • Rui He

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

  • Hyun Ho Kim

    • University of Waterloo, Canada

  • Bowen Yang

    • University of Waterloo
    • University of Waterloo, Canada

  • Adam W Tsen

    • University of Waterloo
    • University of Waterloo, Canada

  • Siwen Li

    • University of Michigan

  • Xiangpeng Luo

    • University of Michigan

  • Kai Sun

    • University of Michigan
    • University of Michigan - Ann Arbor
    • Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States

  • Liuyan Zhao

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