A model of ferroelectric ordering in nonlinear proustite crystals Ag3 AsS3
Meleshko A.N., Shumovskii A.S.
We propose a model based on the existence of a strong coupling between the dipole, phonon, and electron subsystems near the ferroelectric phase transition point, which can describe the experimentally observed basic singularities of the phase transition in proustite under the influence of light.