Media effect on charge carriers scattering in a thin semiconducting wire

The effect of difference of dielectric constants of a size-quantized wire and surrounding media on the momentum relaxation time and mobility of charge carriers is considered in their scattering on the non screened coulomb impurity centers. The analytic expressions for the momentum relaxation rate and mobility are obtained for various cases of space distribution of impurity centers (background and remote impurities, uniform distribution of impurities), and also the temperature and concentration dependences of mobility are found. 11 refs