Theoretical investigations of spin-phonon coupling in 2DMMs. (A) Schematic of magnetic coupling change in monolayer MnPSe₃ induced by biaxial strain. Adapted with permission from [140]. Copyright©2018, Springer Nature. (B) The interlayer exchange energy landscape for different stacking orders in bilayer CrI₃. Adapted with permission from [10]. Copyright©2018, American Chemical Society. (C) Raman spectra of CrI₃ monolayer with parallel polarization laser setup showing different features in AFM and FM states. Adapted with permission from [11]. Copyright©2018, Royal Society of Chemistry. (D) Magnetic phase transition in monolayer CrOCl induced by uniaxial strain. Adapted with permission from [15]. Copyright©2020, Royal Society of Chemistry. (E) Calculated total energy of the ferromagnetic (black squares) and antiferromagnetic (red circles) states for the atomic displacement of certain phonon modes in the ferromagnetic monolayer CrBr₃. Adapted with permission from [141]. Copyright©2022, John Wiley & Sons, Inc.