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Manuscript Title: Acoustic phonon anisotropy: phonon focusing.
Authors: G.A. Northrop
Program title: ACOUSTIC PHONON ANISOTROPY
Catalogue identifier: AAOJ_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 28(1982)103
Programming language: Fortran.
Computer: DEC LSI 11-23.
Operating system: RT-11 VERSION 3.0.
RAM: 13K words
Word size: 16
Keywords: Solid state physics, Acoustics, Phonons, Elastic waves, Anisotropy, Phonon focusing, Heat-pulse, Lattice dynamics.
Classification: 7.8.

Nature of problem:
Calculation of the phase velocity, polarization vector, group velocity, and phonon-focusing enhancement factor for non-dispersive acoustic plane-waves of any wave-vector.

Solution method:
The group velocity and the phonon-focusing enhancement are calculated from the derivatives of the characteristic equation of the Christoffel equations.

Restrictions:
The material must be described by a symmetric real 6-vector elastic constant matrix.

Running time:
0.3 s.