Piezoelectricity and Acoustic Waves

This lecture covers the fundamental concepts of piezoelectricity, including the direct and inverse piezoelectric effects discovered by P. and J. Curie in 1880. It explains the conditions required for piezoelectricity to occur in materials and provides examples of mechanical and electric fields in piezoelectric media. The lecture also delves into the generation of electric fields, piezomodulus, and the relationship between deformation and applied field. Furthermore, it explores the propagation of acoustic waves in piezoelectrics, focusing on a 1D case and discussing the wave equation and the impact of piezoelectricity on wave velocity.