Terahertz Magnon Polaritons in YFeO<sub>3</sub> in Pulsed High Magnetic Fields

ORAL

Abstract

Antiferromagnetic materials are promising for spintronic applications due to faster spin dynamics than ferromagnets. YFeO3 is a canted antiferromagnet that supports quasi-antiferromagnetic and quasi-ferromagnetic magnon modes in the terahertz (THz) frequency range. Here, we investigate magnon polaritons arising from coupling between THz photons and the quasi-ferromagnetic magnon mode as a function of magnetic field up to 30 T applied along the c-axis using single-shot THz time-domain spectroscopy. We observe a peak splitting whose magnitude increases with the applied magnetic field. We developed a microscopic theoretical model that explains the data without any fitting parameters. The thickness dependence of the splitting at a given magnetic field shows a smooth crossover from a magnon regime to a magnon-polariton regime.

*We acknowledge support from the Army Research Office (Grant No. W911NF-17-1-0259).
This research was partially supported by the National Science Foundation through the Center for Dynamics and Control of Materials: an NSF MRSEC under Cooperative Agreement No. DMR-1720595.

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Presenters

  • Andrey Baydin

    • Rice University
    • Rice Univ
    • Department of Electrical and Computer Engineering, Rice University

Authors

  • Andrey Baydin

    • Rice University
    • Rice Univ
    • Department of Electrical and Computer Engineering, Rice University

  • Kenji Hayashida

    • Rice University
    • Division of Applied Physics, Hokkaido University

  • Nicolas Marquez Peraca

    • Rice University
    • Rice Univ
    • Department of Physics and Astronomy, Rice University

  • Takuma Makihara

    • Rice University

  • Fuyang Tay

    • Rice University
    • Rice Univ
    • Department of Electrical and Computer Engineering, Rice University

  • Xinwei Li

    • Rice University
    • Department of Physics, California Institute of Technology
    • Department of Electrical and Computer Engineering, Rice University

  • Xiaoxuan Ma

    • Shanghai University
    • Department of Physics, Shanghai University

  • Zuanming Jin

    • Shanghai University

  • Wei Ren

    • Shanghai University

  • Guohong Ma

    • Shanghai University

  • Gary T Noe

    • Rice University

  • Ikufumi Katayama

    • Yokohama National University

  • Jun Takeda

    • Yokohama National University

  • Hiroyuki Nojiri

    • Tohoku University

  • Dmitry Turchinovich

    • Universität Bielefeld

  • Shixun Cao

    • Shanghai University
    • Department of Physics, Shanghai University

  • Motoaki Bamba

    • Kyoto University
    • Department of Physics, Kyoto University

  • Junichiro Kono

    • Electrical and Computer Engineering, Rice University
    • Department of Electrical and Computer Engineering, Rice Univ
    • Rice University
    • Rice Univ
    • Department of Electrical and Computer Engineering, Rice University
    • Department of Physics and Astronomy, Rice University