Hybrid lead-halide perovskites have emerged as an excellent class of photovoltaic
materials. Recent reports suggest that the organic molecular cation is responsible for local …

This paper reviews ferroelectric oxides in the unusual condition where the concentration of
electronic carriers is close to a metal–insulator transition; in certain structures and …

Feature size is a natural determinant of material properties. Its design offers the
technological perspectives for material improvement. Grain size, crystallite size, domain …

This article reviews the polarizability model and its applications to ferroelectric perovskite
oxides. The motivation for the introduction of the model is discussed and nonlinear oxygen …

Temperature dependent diffuse reflectance spectroscopy measurements were carried out
on polycrystalline samples of BaTiO 3 across the tetragonal to cubic structural phase …

Halide perovskites exhibit beneficial opto-electronic properties (eg long carrier lifetimes and
low defect densities), and their dynamic structural instabilities and anharmonic thermal …

The acoustic anomalies and precursor dynamics of high-quality barium titanate single
crystals were investigated by Brillouin light scattering and the birefringence measurements …

The dynamical properties of ferroelectric perovskites have typically been classified as being
either of order-disorder or displacive type. Here we show that this simple scheme is not …

Solution-processable metal halide perovskites (MHPs) offer great promise for efficient light-
harvesting and-emitting devices because of their long carrier lifetime and superior carrier …

Resonant ultrasound spectroscopy (RUS) provides a window on the pervasive influence of
strain coupling at phase transitions in perovskites through determination of elastic and …