High-κ Perovskite-Like Ternary Niobium Oxide Dielectrics for 2D Electronics.

ABSTRACT: High-κ dielectrics with exceptional interface quality are essential for the field-effect control of nanoscale transistors. However, their design remains challenging due to competing atomic-scale polarization requirements. Here, we demonstrate nonlayered perovskite-like ternary niobium oxides (CaNb₂O₆, KNb₃O₈, and Na₂Nb₄O₁₁) as promising candidates, where strong Nb 4d-O 2p covalent hybridization enables pronounced Nb⁵⁺ ionic displacements and enhanced polarization, while ionic bonding from intercalated Ca/K/Na suppresses electronic transitions, widening the bandgap and enhancing stability via configurational entropy. We successfully synthesize these high-quality nanoflakes through a scalable molten-salt

SUBMITTER: Zhang B 

PROVIDER: S-EPMC12921349 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature