Portland State University. Department of Physics
Date of Award
Master of Science (M.S.) in Physics
1 online resource (91 p.)
Crystals -- Defects
We examine the problem of the dynamics of a hexagonal close packed crystal with a single substitutional impurity. The effects of the mass and the force constant changes due to the introduction of the impurity atom are taken into account assuming nearest neighbor interactions under the harmonic approximation. Using Green’s function and group theoretical methods, the equations of motion for the perturbed normal modes are obtained in an exact form. The calculations are performed by allowing for very general force constant changes which can have noncentral as well as central contributions. The analytical expressions obtained expressions obtained by Mannheim and Cohen for cubic systems.
Karulkar, Pramod C., "The Dynamics of an HCP Crystal with a Substitutional Defect" (1975). Dissertations and Theses. Paper 2190.