Internal-mode line-broadening by proton jumps in KH2PO4

I. Laulicht, N. Luknar

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


The Raman linewidth of the 914 cm-1 line of KH2PO4 in the ferroelectric phase has been measured as a function of temperature. The drastic decrease in linewidth with cooling near Tc is in fair agreement with a recent pseudo-spin-phonon coupling theory. A quantitative correlation has been found between the Raman linewidth, the spotaneous polarization and the proton spin-lattice relaxation time. A search for a similar effect on the corresponding line in KH2AsO4 gave negative results.

Original languageEnglish
Pages (from-to)237-240
Number of pages4
JournalChemical Physics Letters
Issue number2
StatePublished - 15 Apr 1977


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