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Journal of Advanced Ceramics

Authors

Longlong SHU, School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China Jiangxi Key Laboratory for Two-dimensional Materials and Devices, and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
Renhong LIANG, School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China
Zhenggang RAO, School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China Jiangxi Key Laboratory for Two-dimensional Materials and Devices, and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
Linfeng FEI, School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China Jiangxi Key Laboratory for Two-dimensional Materials and Devices, and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
Shanming KE, School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China Jiangxi Key Laboratory for Two-dimensional Materials and Devices, and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
Yu WANG, School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China Jiangxi Key Laboratory for Two-dimensional Materials and Devices, and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China

Keywords

flexoelectricity, strain gradient, electric polarization, dielectric constant, liquid crystals, sensors and actuators

Abstract

Flexoelectricity refers to the mechanical-electro coupling between strain gradient and electric polarization, and conversely, the electro-mechanical coupling between electric field gradient and mechanical stress. This unique effect shows a promising size effect which is usually large as the material dimension is shrunk down. Moreover, it could break the limitation of centrosymmetry, and has been found in numerous kinds of materials which cover insulators, liquid crystals, biological materials, and semiconductors. In this review, we will give a brief report about the recent discoveries in flexoelectricity, focusing on the flexoelectric materials and their applications. The theoretical developments in this field are also addressed. In the end, the perspective of flexoelectricity and some open questions which still remain unsolved are commented upon.

Publisher

Tsinghua University Press

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