Impact Ionization or Ionization Breakdown Gain and Coefficient Calculator
References:
Silicon: P.P. Webb, Measurements of Ionization Coefficients in Silicon at Low Electric Fields, GE Canada Inc., Electro Optics Operations W.N. Grant, Solid State Electronics, 16, 1189 (1973)
Indium Phosphide: C. A. Armiento and S. H. Groves, Applied Physics Letters, Vol 43, No. 2
Gallium Arsenide: H. David Law and Charles A. Lee, Solid-State Electronics, Vol. 21, pp. 331-340