Flexoelectric engineering of van der Waals ferroelectric CuInP₂S₆.

ABSTRACT: Van der Waals layered CuInP₂S₆ (CIPS) is an ideal candidate for developing two-dimensional microelectronic heterostructures because of its room temperature ferroelectricity, although field-driven polarization reversal of CIPS is intimately coupled with ionic migration, often causing erratic and damaging switching that is highly undesirable for device applications. In this work, we develop an alternative switching mechanism for CIPS using flexoelectric effect, abandoning external electric fields altogether, and the method is motivated by strong correlation between polarization and topography variation of CIPS. Phase-field simulation identifies a critical radius of curvature around 5 μm for strain gradient to be effective, which is realized by engineered topographic sur

SUBMITTER: Ming W 

PROVIDER: S-EPMC9390982 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature