supplementary material

See the supplementary material for theoretical methods and computational details; mechanical properties and AIMD simulations at 300 K of InXY monolayers; structural scanning and phonon dispersion spectra of paraelastic state P of InXY monolayers; HSE06 band structure of InXY monolayers with considering SOC effect; average electrostatic potential of InXY monolayers at HSE06 level; calculated carrier mobilities of InXY monolayers.