Lifshitz-point critical and tricritical behavior in anisotropically stressed perovskites

Amnon Aharony*, Alastair D. Bruce

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Scopus citations


The antiferrodistortive phase transitions of some perovskite crystals, driven first order by strongly cubic order-parameter fluctuations, are shown to become continuous at finite anisotropic stresses favoring ordering of one order-parameter component. The associated critical and tricritical behavior will be that of one of a spectrum of uniaxial Lifshitz systems, its precise character reflecting the form of the anisotropy in the soft-mode dispersion. Our predictions are in substantial accord with recent experiments on RbCaF3.

Original languageEnglish
Pages (from-to)462-465
Number of pages4
JournalPhysical Review Letters
Issue number7
StatePublished - 1979


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