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Frequency Spectra and Thermal Properties of Rare Gas Solids (Argon and Krypton)
Author(s) -
Kushwaha M. S.,
Kushwaha S. S.
Publication year - 1978
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.2220890231
Subject(s) - krypton , argon , brillouin zone , rare gas , debye model , phonon , spectral line , materials science , thermal , lattice (music) , debye , atomic physics , atmospheric temperature range , range (aeronautics) , thermodynamics , condensed matter physics , physics , quantum mechanics , acoustics , composite material
The unpaired elastic force model developed by the present authors is extended for studying the phonon frequencies of solid argon and krypton at all the irreducible points of the first Brillouin zone with finer subdivisions (1000). This is used to calculate the lattice heat capacities and Debye characteristic temperatures at different temperatures in the range 3 to 50 K. The comparison of theoretical values with the recently available experimental data reveals a fairly good agreement.