A geometrical model for Mixed cyanide crystals
Disordered Systems and Neural Networks
2015-06-25 v1 Statistical Mechanics
Abstract
A model of diluted random field sustained by quenched volume deformations is shown to reproduce puzzling physical features found in X(CN)_{x}Y_{1-x} mixed cyanide crystals. X is an alkali metal (K, Na or Rb) and Y is a spherical halogen ion (Br, Cl or I). Critical thresholds x_c at which associated first order ferroelastic transitions disappear are calculated exactly. The diluted random field is shown to compete with compressibility in making the transition first order. Transitions are then found to remain first order down to x_c except in the case of bromine dilution where they become continuous. All the results are in excellent agreement with available experimental data.
Cite
@article{arxiv.cond-mat/9901012,
title = {A geometrical model for Mixed cyanide crystals},
author = {Serge Galam},
journal= {arXiv preprint arXiv:cond-mat/9901012},
year = {2015}
}
Comments
10 pages, latex