Anomalous Phase Transitions in LiCsSO_4 in the Compressible hcp Ising Model

摘要

Structural low-temperature phase transformations in LiCsSO_4 are analysed in a newly tailored simple model of the static soliton in the periodically modulated phases of the one-dimensional compressible Ising model. It is shown that the original hcp symmetry is crucial for understanding of the anomalous temperature-dependence of the Brillouin shift.