Study of Local Lattice Relaxation of Substitutional Impurities in Silicon and Germanium

摘要

Local lattice relaxation of substitutional donors in silicon investigated using self-consistent multiple scattering X_alpha (MSXa) method within the framework of the standard muffin-tin potential approximation is extended to substitutional donors in germanium and substitutional acceptors in both silicon and germanium.Incorporating the effect of lattice relaxation surrounding the impurity makes the model suitable for both shallow and deep levels.Chemical trends of some aspects of impurity states,such as local lattice relaxation and charge transfer,of the impurities both in silicon and germanium are inferred.