Piezoelectric Properties of Ferroelectric SbSBr Crystal

Abstract

The contribution of soft mode at Sb atom's site to the temperature dependences of Sb atom's equilibrium position's difference z 33 (T) has been studied theoretically, when SbSBr crystal is deformed in direction of c(z)-axis in paraelectric and in ferroelectric phases. The largest change of z 33 (T) occurs in the ferroelectric phase near the transition temperature T C = 21 K. The temperature dependence of Sb atom's equilibrium position's displacements z 33 is very similar to the temperature dependence of experimental piezoelectric modulus of SbSBr crystal in ferroelectric phase.

van der Waals Stacking-Determined Polymorphs of Quasi-One-Dimensional BiSCl Grown by Chemical Vapor Deposition

“…Quasi-one-dimensional (quasi-1D) materials have garnered significant attention in recent years as a result of their unique physical properties. − Group V chalcohalides are a class of ternary quasi-1D materials with the chemical formula ABX (where A represents Bi or Sb, B represents S, Se, or Te, and X represents Cl, Br, or I), which exhibit diverse physical and chemical properties determined by their elemental composition. − Among these materials, bismuth chalcohalides have exhibited remarkable optoelectronic characteristics in theoretical and experimental studies, notably their band gap, light absorption, carrier mobility, and ionic dielectric constant. ,− These outstanding properties render them highly promising for a variety of applications, including photovoltaics, − photodetectors, − thermoelectric devices, − photocatalysis, − ferroelectricity, , piezoelectricity, , and even encompassing topological and superconducting properties , in certain instances.…”

“…6−11 Among these materials, bismuth chalcohalides have exhibited remarkable optoelectronic characteristics in theoretical and experimental studies, notably their band gap, light absorption, carrier mobility, and ionic dielectric constant. 8,12−18 These outstanding properties render them highly promising for a variety of applications, including photovoltaics, 19−22 photodetectors, 23−26 thermoelectric devices, 27−30 photocatalysis, 31−34 ferroelectricity, 35,36 piezoelectricity, 37,38 and even encompassing topological and superconducting properties 39,40 in certain instances.…”