High-temperature optical diode effect without magnetic order in polar FeZnMo<sub>3</sub>O<sub>8</sub>

ORAL

Abstract

We find a giant high-temperature optical diode effect on polar ferrimagnet FeZnMo3O8 using terahertz spectroscopy, where the transmitted light intensity in one direction is higher than the intensity transmitted in the opposite direction by over 100 times. Differently from all existing reports of the optical diode effect in other magnetoelectric materials where the long-range magnetic ordering is a necessary prerequisite, the effect in FeZnMo3O8 takes place in the paramagnetic phase with no long-range magnetic order. In FeZnMo3O8, the effect is observed as a resonance with a strong magnetic dipole active transition centered at 1.27 THz which is assigned as electron spin resonance between the eigenstates of the single-ion anisotropy Hamiltonian. We propose that the optical diode effect in paramagnetic FeZnMo3O8 is driven by single-ion terms in magnetoelectric free energy.

*We acknowledge fruitful discussions with Valery Kiryukhin and Andrei Sirenko. The work at Tulane University was supported by the NSF Award No. DMR1554866. The work at Rutgers University was supported by the DOE under Grant No. DOE: DE-FG0207ER46382.

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Presenters

  • Shukai Yu

    • Physics and Engineering Physics, Tulane Univ

Authors

  • Shukai Yu

    • Physics and Engineering Physics, Tulane Univ

  • Bin Gao

    • Physics and Astronomy, Rutgers Center for Emergent Materials
    • Rutgers University

  • Jae Wook Kim

    • Physics and Astronomy, Rutgers Center for Emergent Materials
    • Rutgers University

  • Sang-Wook Cheong

    • Rutgers University
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics and Astronomy, Rutgers, The State University of New Jersey
    • Physics, Rutgers University
    • Physics and Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Physics and Astronomy, Rutgers Univ.
    • Rutgers Univ
    • Physics, Rutgers Univesity
    • Department of Physics, Rutgers University
    • Physics and Astronomy, Rutgers Center for Emergent Materials
    • Department of Physics & Astronomy , Rutgers University

  • Michael Man

    • Okinawa Inst of Sci & Tech
    • Femtosecond Spectrocopy Unit, Okinawa Inst of Sci & Tech
    • Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology Graduate University

  • Julien Madéo

    • Okinawa Inst of Sci & Tech
    • Femtosecond Spectroscopy Unit, Okinawa Inst of Sci & Tech
    • Femtosecond Spectrocopy Unit, Okinawa Inst of Sci & Tech
    • Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology Graduate University

  • Keshav Dani

    • Okinawa Inst of Sci & Tech
    • Femtosecond Spectroscopy Unit, Okinawa Inst of Sci & Tech
    • Femtosecond Spectrocopy Unit, Okinawa Inst of Sci & Tech
    • Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology Graduate University

  • Diyar Talbayev

    • Department of Physics and Engineering Physics, Tulane Univ
    • Physics and Engineering Physics, Tulane Univ