Ultrafast decoupling of polarization and strain in ferroelectric BaTiO₃.

ABSTRACT: A fundamental understanding of the interplay between lattice structure, polarization and electrons is pivotal to the optical control of ferroelectrics. The interaction between light and matter enables the remote and wireless control of the ferroelectric polarization on the picosecond timescale, while inducing strain, i.e., lattice deformation. At equilibrium, the ferroelectric polarization is proportional to the strain, and is typically assumed to be so also out of equilibrium. Decoupling the polarization from the strain would remove the constraint of sample design and provide an effective knob to manipulate the polarization by light. Here, upon above-bandgap laser excitation of the prototypical ferroelectric BaTiO₃, we induce and measure an ultrafast decoupling between polariza

SUBMITTER: Hoang LP 

PROVIDER: S-EPMC12381263 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature