Selfconsistent Lattice-Dynamical Theory
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B. Pietrass
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Article
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1972
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John Wiley and Sons
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English
β 457 KB
## Abstract The temperature dependence of the soft mode frequency and of the displacement parameter, associated with the structural phase transition in perovskiteβtype crystals, is calculated from anharmonic lattice dynamics in a selfconsistent way. The theory describes the changeβover from the Lan