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Spectral density of phonons in alkali metals
Author(s) -
Vaks V. G.,
Zein N. E.,
Kravchuk S. P.,
Trefilov A. V.
Publication year - 1979
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.2220960242
Subject(s) - pseudopotential , alkali metal , phonon , computation , condensed matter physics , chemistry , computational physics , physics , materials science , atomic physics , molecular physics , quantum mechanics , mathematics , algorithm
The phonon spectral density g (ω) is calculated for five alkali metals. The previously described pseudopotential model giving a rather accurate description of these metal dynamics is used for the phonon frequencies computation. The calculated g (ω) are similar for all the alkali metals and have the characteristic three‐peak form with a high and narrow high‐frequency peak. The volume dependence of g (ω) is investigated and is found to be rather sharp. It is shown that g (ω) is very sensitive to the choice of the theoretical model so that its measurements can provide an effective method for the proof of the accuracy of these models.