Science Daily February 1, 2023 An international team of researchers (USA – Ohio State University, Japan) has experimentally shown that an external electric field affects the velocity of the longitudinal acoustic phonons (vLA), thermal conductivity (κ), and diffusivity (D) in a bulk lead zirconium titanate–based ferroelectric. They found that phonon conduction dominates κ due to changes in the phonon dispersion, not in the phonon scattering. Since the ferron carries heat, that makes the amount of heat carried dependent on the electrical field. They wrote a new theory that relates an external electric field, the strain it induces in a ferroelectric, […]