A microscopic theory for the central peak in SrTiO3 |
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| Authors: | F. Schwabl |
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| Affiliation: | Institut für Festkörperforschung der Kernforschungsanlage, 517 Jülich, West Germany |
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| Abstract: | A microscopic theory for the central peak at the R point of SrTiO3 and similar systems is proposed. A phonon resonance is formed by two phonons near the R point. The central resonance arises from the decay of the soft zone boundary phonon into the resonance and a zone boundary phonon. The theory applies also to other non piezoelectric and non pyroelectric soft mode systems. |
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