Accession Number : AD0619351

Title :   SPACE GROUP THEORY AND LATTICE DYNAMICS,

Corporate Author : NEW YORK UNIV N Y DEPT OF PHYSICS

Personal Author(s) : Birman,Joseph L.

Report Date : 1964

Pagination or Media Count : 13

Abstract : The major applications of group theory in lattice dynamics result from the assertion that the lattice normal modes are bases for the irreducible representations of the space group. The construction of character tables for the irreducible representations in diamond is illustrated, and certain tables are presented, which have been used in deriving reduction coefficients and selection rules for infrared and Raman processes in diamond. A brief remark is made on the use of tables of coupling coefficients for the construction of lattice invariants and covariants, which are being used in a theory of infrared lattice vibration absorption. (Author)

Descriptors :   (*CRYSTAL LATTICES, DYNAMICS), (*GROUPS(MATHEMATICS), CRYSTAL LATTICES), VIBRATION, SYMMETRY(CRYSTALLOGRAPHY), MATRICES(MATHEMATICS), SELECTION RULES(PHYSICS), INFRARED RADIATION, DIAMONDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE