Magnetic excitations in noncolinear antiferromagnet MnTe<sub>2</sub>

ORAL

Abstract

A classification of topological magnon has been proposed (arXiv:2206.06248). One candidate that is predicted to have a triply degenerate magnon at zone center is MnTe2. It undergoes a second-order antiferromagnetic transition at around 87K. It was proposed that MnTe2 has a noncolinear magnetic ground state. (doi:10.1103/PhysRevB.56.14013) To study the magnetic interaction in MnTe2, we used time-domain Terahertz and Raman spectroscopies to measure excitations at different temperatures and in magnetic fields. An excitation at around 0.6 THz (2.5 meV) shows up below the transition temperature. We also show the field dependence of the excitations. The results help to understand the magnetic interaction between the Mn2+ ions.

*Work at OSU was supported by the Center for Emergent Materials at OSU, a Materials Research Science and Engineering Center funded by NSF under grant DMR-2011876.

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Presenters

  • Yufei Li

    • Ohio State University

Authors

  • Yufei Li

    • Ohio State University

  • Alex D Giovannone

    • The Ohio State University

  • Thuc T Mai

    • National Institute of Standards and Technology

  • Archibald . Williams

    • The Ohio State University
    • Department of Chemistry and Biochemistry, Ohio State University
    • Department of Chemistry University of Ohio
    • The Ohio State Univ.
    • Ohio State University

  • Joshua E Goldberger

    • The Ohio State University
    • Department of Chemistry and Biochemistry, Ohio State University
    • The Ohio State Univ.
    • Ohio State University

  • Angela R Hight Walker

    • National Institute of Standards and Tech
    • National Institute of Standards and Technology

  • Rolando Valdes Aguilar

    • Ohio State University