Strain-induced room-temperature ferroelectricity in SrTiO₃ membranes.

ABSTRACT: Advances in complex oxide heteroepitaxy have highlighted the enormous potential of utilizing strain engineering via lattice mismatch to control ferroelectricity in thin-film heterostructures. This approach, however, lacks the ability to produce large and continuously variable strain states, thus limiting the potential for designing and tuning the desired properties of ferroelectric films. Here, we observe and explore dynamic strain-induced ferroelectricity in SrTiO₃ by laminating freestanding oxide films onto a stretchable polymer substrate. Using a combination of scanning probe microscopy, optical second harmonic generation measurements, and atomistic modeling, we demonstrate robust room-temperature ferroelectricity in SrTiO₃ with 2.0% uniaxial tensile strain, corrob

SUBMITTER: Xu R 

PROVIDER: S-EPMC7305178 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature