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.
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Presenters
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Yufei Li
Ohio State University
Authors
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Yufei Li
Ohio State University
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Alex D Giovannone
The Ohio State University
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Thuc T Mai
National Institute of Standards and Technology
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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
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Joshua E Goldberger
The Ohio State University, Department of Chemistry and Biochemistry, Ohio State University, The Ohio State Univ., Ohio State University
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Angela R Hight Walker
National Institute of Standards and Tech, National Institute of Standards and Technology
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Rolando Valdes Aguilar
Ohio State University