Supplementary Materials

Figure S1 illustrates the final state determination workflow in our full-band Monte Carlo (FBMC) implementation. Figure S2 denote the necessity fine mesh sampling of Brillouin zone. Figure S3 Temperature-dependent electron-phonon scattering rates for states in the first two conduction bands of beta-Ga2O3. Figure S4. The transient electron velocity characteristics under electric field range from 100 kV/cm to 1 MV/cm