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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.

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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