Spin fluctuations and magneto-elastic coupling in the ferromagnetic van der Waals semiconductor CrSiTe3

ORAL

Abstract

The transition metal trichalcogenide CrSiTe3 is a layered van der Waals semiconductor that has recently been proposed to retain its long-range ferromagnetic order even in the atomically thin limit. Here we examine the nature of the bulk ferromagnetic phase transition using a suite of static and time-resolved optical probes including second harmonic generation, magneto-optical Kerr rotation and optical reflectivity. We show that strong magnetic fluctuations persist far above the Curie temperature, attesting to the strong two-dimensional character of ferromagnetism even in bulk crystals. We also identify strong coupling between the ferromagnetism and specific phonon modes.

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Presenters

  • Alon Ron

    Institute for Quantum Information and Matter, Caltech

Authors

  • Alon Ron

    Institute for Quantum Information and Matter, Caltech

  • Eli Zoghlin

    Materials Department, University of California, Santa Barbara

  • Stephen Wilson

    Materials, University of California, Santa Barbara, Materials Department, University of California, Santa Barbara, University of California, University of California, Santa Barbara, Materials Department, UCSB

  • David Hsieh

    Institute for Quantum Information and Matter, Caltech, Department of Physics, California Institute of Technology, California Institute of Technology, Institute For Quantum Information and Matter, California Institute of Technology