An Extra Diffusion of Zn into GaAs in Low Concentration Range : Application of the Model of Varying Charge Transfer

Abstract
A second diffusion of Zn has been observed in GaAs in the low-concentration range. The behaviour is similar to that of double diffusion in InP. The effect of zinc activity in the vapour phase has been studied using a semiclosed-box system. The observed profiles of Zn have been explained using a model of varying charge transfer by vacancy centers during interstitial-substitutional interchanges.