Fig. S1., Fig. S2., Fig. S3., Fig. S4.

See supplementary material for details on the results of the calculation methods, magnetic configurations, energy difference between different magnetic configurations, spin density distribution, phonon spectra, spin-polarized band structures with SOC and without SOC, spin-polarized band structures with SOC but with opposite magnetization, orbital resolved band structure, berry curvatures, energy difference between the FM and AFM states and valley polarization under biaxial strains.