Cr3Si2Te6

supplementary material for the details of crystal structure, Heisenberg exchange paths, phonon spectrum and AIMD simulations results, Monte Carlo simulations details, the effects of Ueff and vdW correction on the magnetic, electronic and topological properties for Cr3Si2Te6, the magnetic and electronic properties of Cr3Si2Te6 bulk, the crystal and magnetic properties of Cr3Si2Te6 thin films.