The vibrational properties of ferrimagnetic Mn3Si2Te6 single crystals are investigated using Raman spectroscopy and density functional theory calculations. Eighteen Raman-active modes are identified, fourteen of which are assigned according to with the trigonal symmetry. Four additional peaks, obeying the A1g selection rules, are attributed to the overtones. The unconventional temperature evolution of the A1g5 mode self-energy suggests a competition between different short-range magnetic correlations that significantly impact the spin-phonon interaction in Mn3Si2Te6. The research provides a comprehensive insight to the lattice properties, studies their temperature dependence and shows the arguments for existence of competing short-range magnetic phases in Mn3Si2Te6.
@article{arxiv.2209.02664,
title = {Spin-phonon interaction and short range order in $\mathrm{Mn_3Si_{2}Te_6}$},
author = {Sanja Djurdjić Mijin and Andrijana Šolajić and Jelena Pešić and Yu Liu and Cedomir Petrovic and Michel Bockstedte and Alberta Bonanni and Zoran V. Popović and Nenad Lazarević},
journal= {arXiv preprint arXiv:2209.02664},
year = {2023}
}