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DOE OSTI · 1969908

Spin-phonon interaction and short-range order in Mn 3 Si 2 Te 6

Djurdjić Mijin, S.·Šolajić, A.·Pešić, J.·Liu, Y.·Petrovic, Cedomir·Bockstedte, M.·Bonanni, A.·Popović, Z. V.·Lazarević, N.
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Abstract

The vibrational properties of ferrimagnetic Mn 3 Si 2 Te 6 single crystals are investigated using Raman spectroscopy and density functional theory calculations. Eighteen Raman-active modes are identified, 14 of which are assigned according to the trigonal symmetry. Four additional peaks, obeying the A 1g selection rules, are attributed to the overtones. The unconventional temperature evolution of the A$^{5}_{1g}$ mode self-energy suggests a competition between different short-range magnetic correlations that significantly impact the spin-phonon interaction in Mn 3 Si 2 Te 6 . This research provides comprehensive insight into the lattice properties, studies their temperature dependence, and shows arguments for the existence of competing short-range magnetic phases in Mn 3 Si 2 Te 6 .

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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYRaman spectroscopydensity functional theorylayered crystalsphononsspin-phonon coupling

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Djurdjić Mijin, S., Šolajić, A., Pešić, J., Liu, Y., Petrovic, Cedomir, Bockstedte, M., Bonanni, A., Popović, Z. V., Lazarević, N.. 2023-02-21. Spin-phonon interaction and short-range order in Mn 3 Si 2 Te 6. https://doi.org/10.1103/physrevb.107.054309

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