Scattering rates versus energy in InSb (a) and InAs (b) at room temperature in the Γ valley. The different scattering rates are those of ionized impurity scattering (black line), acoustic phonon scattering (black dash curve), phonon absorption of Γ–L intravalley scattering (blue curve), phonon emission of Γ–L intravalley scattering (blue dash curve), phonon absorption of Γ –X intravalley scattering (green curve), phonon emission of Γ–X intravalley scattering (green dash curve), absorption (ab) of polar optical phonon scattering (pink curve), emission (em) of polar optical phonon scattering (pink dash curve), and impact ionization(red curve), respectively.