Abstract
The ferroelectric phase transition of potassium dihydrogen phosphate, KDP, which occurs at 122°K, is generally considered to result from the ordering of protons which occupy double minima potential wells [1]. Blinc and Kobayashi[2] have included the effects of interaction between the tunnelling protons and lattice distortion to predict a collective excitation having the Cochran behavior ω2 221d T-To; we shall henceforth refer to it as the ferroelectric soft mode.
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References
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Brody, E.M., Cummins, H.Z. (1969). Brillouin Scattering Study of the Ferroelectric Phase Transition of KH2 PO4 . In: Wright, G.B. (eds) Light Scattering Spectra of Solids. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-87357-7_74
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DOI: https://doi.org/10.1007/978-3-642-87357-7_74
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