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Collective vibrations of protons in compounds of the KH 2 PO 4 ‐type the cluster approximation
Author(s) -
Stasyuk I. V.,
Levitskii R. R.,
Korinevskii N. A.
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.2220910219
Subject(s) - excitation , cluster (spacecraft) , proton , spectrum (functional analysis) , type (biology) , vibration , atomic physics , physics , chemistry , quantum mechanics , geology , computer science , programming language , paleontology
The dynamics of the proton system of KH 2 PO 4 ‐type compounds is considered in the cluster approximation taking into account their real structure. The equation for the excitation spectrum is obtained. For the particular case of the four‐sublattice de Gennes model the conclusion is made that the excitation spectrum contains the pseudo‐soft mode. It is shown also, that for KH 2 PO 4 model the mentioned conclusion is correct.