Screening piezoelectricity in determination of flexoelectric coefficient at nanoscale

Strong Piezoelectricity and Improved Rectifier Properties in Mono‐ and Multilayered CuInP2S6

“…[9,16,17] To circumvent this obstacle, strain gradient engineering can be utilized as a new strategy to modulate the rectifying properties of these ultrathin layers [18] or the Schottky barrier in the local region under the tip. [19][20][21] The strain gradient could be significantly increased by 6 orders of magnitude with the thickness scaling from micrometer down to nanometer, [22] which induces a remarkable flexoelectricity. Most importantly, strain gradient exists widely and can be easily introduced into flexible 2D materials via bending, folding, and wrinkling.…”

Explicit topology optimization for graded lattice flexoelectric nanostructures via ersatz material model

“…[10][11][12][13][14][15] One of the effective approaches is to increase the local strain gradient by changing the structural configuration through theoretical analysis or experiments. [16][17][18] In order to obtain a systematic design methodology, topology optimization, which is to optimize the distribution of materials in a given domain to maximize the inherent performance of materials, has been regarded as a potential tool for improving flexoelectricity. Ghasemi et al 19 first proposed a level set-based topology optimization approach for flexoelectric design.…”

“…To obtain higher flexoelectric device performance, a great deal of work focuses on improving electromechanical coupling property 10–15 . One of the effective approaches is to increase the local strain gradient by changing the structural configuration through theoretical analysis or experiments 16–18 . In order to obtain a systematic design methodology, topology optimization, which is to optimize the distribution of materials in a given domain to maximize the inherent performance of materials, has been regarded as a potential tool for improving flexoelectricity.…”