Unusual Triple-State Switching of Thermally Induced Birefringence in a Two-Dimensional Perovskite Ferroelectric.

ABSTRACT: Birefringent crystals hold a significant position in optical and optoelectronic fields due to their capability to control polarized light. Despite various chemical strategies devoted to designing birefringent crystals, it remains a challenge to switch and manipulate birefringence under physical stimuli. Here we present an unusual triple-state switching of birefringence in a 2D perovskite ferroelectric, (N-methylcyclohexylammonium)₂PbCl₄ (1), which exhibits two reversible phase transitions at 361 and 373 K. The in-plane birefringence of 1 (Δn_bc) shows three distinctive states inside the bc plane, namely, the low-, high-, and zero-Δn_bc states. Strikingly, a huge augmentation of Δn_<

SUBMITTER: Ma Y 

PROVIDER: S-EPMC11468785 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature