Related Experiment Video
Updated: Sep 17, 2025

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Elastic and Anelastic Behavior Associated with Structural Transitions in CsPbBr3
Pingjing Luo1, Zhengwang He2, Dexin Yang1
1Institute of Advanced Magnetic Materials, College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
Abstract:
Strain coupling and relaxation dynamics critically influence the photovoltaic and photoluminescent performances of metal halide perovskites. Here, resonant ultrasound spectroscopy is employed to study the elastic and anelastic properties associated with the octahedral tilting transitions in the optoelectronic semiconductor CsPbBr3 over the temperature range 303-468 K. The cubic-to-tetragonal transition near 405 K is marked by pronounced elastic softening accompanied by a sharp increase in acoustic loss. High anelastic loss below this transition reveals the presence of mobile ferroelastic twin walls that become pinned by lead vacancies at a temperature interval near 380 K in the tetragonal phase. The elastic softening in the cubic phase is strongly correlated to dynamic effects such as the local polar fluctuations. This local disordered effect is further verified by the anomalously high attenuation in the orthorhombic structure, in which the ferroelastic twin walls might become mobile.
More Related Videos
Related Concept Videos
Plastic Behavior
Members Made of Elastoplastic Material
As the bending moment...
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Stress-Strain Diagram - Brittle Materials
Plasticity
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....

