IMPACT NEUTRALIZATION OF D- IONS IN GAAS AND INP

Impact neutralization coefficient for the reaction D-+e-->D-0+2e is re ported, where D- and DO are the negatively charged and neutral donor, respectively, and e is the conduction band electron. The coefficient w as calculated using the Boltzmann transport equation and the scaled ne utralization cross section of the negatively charged hydrogen atom. At liquid helium and lower temperatures the above reaction for n-GaAs an d n-InP doped with shallow donors was found to be characterized by a r elatively large impact neutralization coefficient. At weak electric fi elds, from about 0.2 to 1 V/cm, the neutralization coefficient increas es exponentially and at higher fields saturates at the value of about 1.5 x 10(-3) cm(3)/s for n-GaAs and 9 x 10(-4) cm(3)/s for n-InP. (C) 1997 American Institute of Physics.