Precise Tuning of Flexoelectricity in SrTiO₃ by Ion Irradiation.

ABSTRACT: Flexoelectric coefficient is a tetradic and its introduction enables centrosymmetric materials to exhibit piezoelectricity. However, the flexoelectric paradigm currently lacks a strategy to effectively tune the strain gradient for optimal electro-mechanical coupling. This study proposes a quantized collision model accessible through ionic irradiation technology to explore the flexoelectricity and precisely modulate the strain gradient. The lattice strain is introduced in SrTiO₃ (STO) single crystals and tuned broadly by irradiation with ions of He⁺, C⁺, and P⁺ at dose of 1 × 10¹⁴ and 2 × 10¹⁵ ion cm^-2, respectively. Under C⁺ ion irradiation at a dose of 2 × 10¹⁵ ion cm^-2, thin-film

SUBMITTER: Nan S 

PROVIDER: S-EPMC11809336 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature