Synthesizing ordered polar patterns in nonpolar SrTiO₃ nanofilms via wrinkle-induced flexoelectricity.

ABSTRACT: Ordered polar structures in oxide nanofilms play a pivotal role in the development of nanoelectronic applications. Hitherto, ordered polar structures have been restricted to a limited number of ferroelectric materials, and there is no effective scheme to induce and manipulate ordered polar patterns in centrosymmetric nonpolar nanofilms due to the absence of spontaneous symmetry breaking. Here, we circumvent these limitations by utilizing the wrinkle-induced strain gradient modulation associated with flexoelectricity as a general means of inducing and manipulating ordered polar patterns in nonpolar nanofilms. Leveraging the surface instability caused by strain mismatch between oxide nanofilms and pre-strained compliant substrate, we successfully fabricate striped SrTiO₃ wrinkles,

SUBMITTER: Shang H 

PROVIDER: S-EPMC11626192 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature