Date of Award

1975

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Physics

Department

Physics

Physical Description

1 online resource (91 p.)

Subjects

Crystals -- Defects

DOI

10.15760/etd.2187

Abstract

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.

Description

A thesis submitted in partial fulfillment of the requirements for the degree of Mater of Science in Physics

Persistent Identifier

http://archives.pdx.edu/ds/psu/14565

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