On the validity of the lyddane-sachs-teller relation at long wavelengths

Among the polarization modes of an ionic crystal there exists no Lyddane-Sachs-Teller relation for very long wavelengths. The implication in certain recent experiments that the LST relation is valid at k = 0 is shown to be due to misinterpretation of the theory and the experimental data.

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 1965-01, Vol.26 (3), p.529-531
Main Authors: Casselman, T.N., Mitra, S.S., Spector, H.N.
Format: Article
Language:English
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Summary:Among the polarization modes of an ionic crystal there exists no Lyddane-Sachs-Teller relation for very long wavelengths. The implication in certain recent experiments that the LST relation is valid at k = 0 is shown to be due to misinterpretation of the theory and the experimental data.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(65)90128-9