Interplay of defect dipole and flexoelectricity in linear dielectrics. (15th March 2022)

• Record Type: Journal Article
• Authors: Wang, Zhiguo; Li, Chunchun; Zhang, Zhen; Hu, Yongming; Huang, Wenbin; Ke, Shanming; Zheng, Ren-Kui; Li, Fei; Shu, Longlong
• Is Part Of: Scripta materialia. Number 210(2022)
• Publication Date: 2022-03-15
• Subjects: Flexoelectricity -- Defect dipole -- Oxygen vacancy -- Linear dielectrics; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.114427
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Flexoelectricity is apparently linearized with the dielectric permittivity and therefore regarded as an inherent dielectric response of solid dielectrics. Herein, we study the role of defect dipole to flexoelectricity by selecting several typical linear dielectrics, wherein the external factors including the surface piezoelectricity, ferroelectricity, and semiconducting interface are strictly eliminated. It is found that the defect dipoles could result in several times enhancement for both the flexoelectric coefficient and the flexocoupling coefficient of the linear dielectrics. The output of this work indicates that introducing defects was a general approach to improve the flexoelectric response. Graphical abstract: Image, graphical abstract