Ferrimagnetic spin waves in honeycomb and triangular layers of Mn3Si2Te6

A detailed analysis of the ferrimagnetic ground state of Mn3Si2Te6has been performed using inelastic neutron scattering. Although the proposed valence of the nominal Mn2+ ions would have quenched orbital angular momentum, a significant exchange anisotropy exists in Mn3Si2Te6. This apparent exchange anisotropy is a manifestation of a weak spin-orbit coupling in the layered material. We employ a detailed simulation of the spin-wave spectrum coupling traditional refinement of dispersion parameters to image analysis techniques, while including Monte Carlo simulations of the instrumental resolution to accurately identify the exchange couplings to the third nearest neighbor. An independent validation of our results is made by comparing our final Hamiltonian to heat capacity measurements.

Automated summary

A detailed analysis of the ferrimagnetic ground state of Mn3Si2Te6 using inelastic neutron scattering has been conducted in this study. The study reveals the existence of exchange anisotropy in Mn3Si2Te6, indicating a weak spin-orbit coupling in the material. The research employs a detailed simulation of the spin-wave spectrum and traditional refinement techniques, along with Monte Carlo simulations, to accurately determine the exchange couplings. The results are independently validated through a comparison with heat capacity measurements.