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On the Lattice Dynamics of Alkali Metals
Author(s) -
Soma T.
Publication year - 1980
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.2220990119
Subject(s) - alkali metal , phonon , compressibility , perturbation theory (quantum mechanics) , condensed matter physics , dispersion (optics) , lattice (music) , perturbation (astronomy) , physics , materials science , statistical physics , thermodynamics , quantum mechanics , acoustics
The experimentally observed dispersion curves of alkali metals are reproduced using second‐order perturbation theory and the local Heine‐Abarenkov model potential. The effect of different forms of exchange and correlation on the phonon frequency, the compressibility problem, and the crossing of dispersion curves in [001] direction are investigated.