1972/09/01 by R. Blinc, B. Žekš · 3 citations
Materials Science · Physics and Astronomy · Engineering · #Solid-state spectroscopy and crystallography #Theoretical and Computational Physics #Acoustic Wave Resonator Technologies
paper · doi:10.1080/00018737200101348
Abstract The dynamics of order-disorder-type ferroelectrics and anti-ferroelectrics is discussed with reference to recent theoretical and experimental investigations. Following a short review of the lattice dynamical theory of structural phase transitions the pseudo-spin formalism appropriate for order-disorder-type systems is introduced. It is shown that most dynamical properties of such systems can be described by a pseudo-Ising model in a transverse tunnelling field. Finally, the predictions of the pseudo-spin wave theory are compared with some recent experiments.