Halogen-regulating induced reversible high-temperature dielectric and thermal transitions in novel layered organic–inorganic hybrid semiconducting crystals

Abstract

Organic-inorganic hybrid metal halides for high temperature phase transition have been increasingly attentional owing to their wide operating temperature range in practical applications, e.g. energy storage, permittivity switches and opto-electronic...

Three-Step Ferroelastic Transitions from Hexagonal to Triclinic Phases in a Hybrid Perovskite: (1-Fluoromethyl-1-methylpyrrolidine)[CdCl3]

“…Organic–inorganic hybrid crystals are currently the primary field of exploration for ferroelastic materials in the past decades. − In particular, ABX 3 -type hybrid perovskites (the organic cation is typically the A site, the metal ion occupies the B site, and pseudohalogen/halogen anions are commonly at the X site) are endowed with extensive chemical diversity via adjusting A site, B site, or X site for various functional materials such as ferroelectric and ferroelastic materials. − For instance, by adjusting subtle intermolecular hydrogen bonds, we recently obtained an ultrahigh- T c hexagonal molecular ferroelastic, (nortropinium)­[CdCl 3 ], undergoing two-step ferroelastic phase transitions. Their Aizu notations are given as mmm F2/ m and 6/ mmm F mmm , respectively .…”