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A comparison of the long wave optical phonons in trigonal Se and trigonal Te
Author(s) -
Lucovsky G.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220490226
Subject(s) - trigonal crystal system , phonon , scaling , condensed matter physics , amorphous solid , lattice (music) , materials science , physics , optics , chemistry , crystallography , crystal structure , mathematics , geometry , acoustics
The frequencies of the long wave optical phonons in trigonal Se and Te are compared. Differences in the relative frequencies of the A 1 and A 2 modes, and in several of the elastic constants as well, are attributed to differences in the intra‐ and inter‐chain bonding. These comparisons are made quantitative by defining reduced lattice dynamical properties in which the nearest and second nearest neighbor distances are used as scaling parameters respectively for the intra‐ and inter‐chain properties. The comparison is extended to the optic mode frequencies of amorphous Se and Te.