Description of CuInP<sub>2</sub>S<sub>6</sub> ferrielectrics in a mixed Ising model
R. Yevych,
V. Liubachko,
V. Hryts
et al.
Abstract:The appearance of spontaneous polarization in CuInP2S6 ferrielectrics is related to the second order Jahn-Teller effect for copper cations located in a double-well local potential, the stereoactivity of indium cations located in a three-well local potential, as well as the valence fluctuations of phosphorus cations. The paraelectric to ferrielectric phase transition is primarily determined by the coupling of indium cations with their surroundings. This transition can be analyzed using the mixed Ising model wit… Show more
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