Colossal Cryogenic Electro-Optic Response Through Metastability in Strained BaTiO₃ Thin Films.

ABSTRACT: The search for thin film electro-optic materials that can retain superior performance under cryogenic conditions has become critical for quantum computing. Barium titanate thin films show large linear electro-optic coefficients in the tetragonal phase at room temperature, which is severely degraded down to ≈200 pm V^-1 in the rhombohedral phase at cryogenic temperatures. There is immense interest in manipulating these phase transformations and retaining superior electro-optic properties down to liquid helium temperature. Utilizing the thermodynamic theory of optical properties, a large low-temperature electro-optic response is designed by engineering the energetic competition between different ferroelectric phases, leading to a low-symmetry monoclinic phase with a massive electro

SUBMITTER: Suceava A 

PROVIDER: S-EPMC12801356 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature