Effect of Tunnelling and Glass Phase in Mixed Crystals of Kdp Type

V. Aksenov, M. Bobeth, N. M. Plakida

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Some thermodynamical and dynamical properties of mixed ferro- and antiferroelectric crystals with hydrogen bonds of the KDP type are investigated theoretically in the framework of the transversal Ising model with random competing interactions where the transverse field describes the tunnelling of the protons. The phase diagram derived for this model suggests the existence of a proton glass phase. The strength of the tunnelling Sl is found to be important for the character of the dynamics of the model. There exists a lower critical tunnelling constant 8: such that for P <Pz the system behaves nonergodically at arbitrary temperatures. For Sl > Pp a nonergodic behaviour is possible only for T <q. For certain values of the tunnelling constant P the temperature T/ agrees with the transition temperature to the proton glass phase.

Original languageEnglish
Pages (from-to)257-272
Number of pages16
JournalFerroelectrics
Volume72
Issue number1
DOIs
Publication statusPublished - 1987

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mixed crystals
Protons
Glass
Crystals
glass
protons
Ising model
Superconducting transition temperature
Ferroelectric materials
Phase diagrams
Hydrogen bonds
transition temperature
phase diagrams
hydrogen bonds
crystals
Temperature
interactions
temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Effect of Tunnelling and Glass Phase in Mixed Crystals of Kdp Type. / Aksenov, V.; Bobeth, M.; Plakida, N. M.

In: Ferroelectrics, Vol. 72, No. 1, 1987, p. 257-272.

Research output: Contribution to journalArticle

Aksenov, V. ; Bobeth, M. ; Plakida, N. M. / Effect of Tunnelling and Glass Phase in Mixed Crystals of Kdp Type. In: Ferroelectrics. 1987 ; Vol. 72, No. 1. pp. 257-272.
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