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Engineering of Electromechanical Oxides by Symmetry Breaking
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Journal Article
Engineering of Electromechanical Oxides by Symmetry Breaking
2023
Overview
Complex oxides exhibit a wide range of fascinating functionalities, such as ferroelectricity, piezoelectricity, and pyroelectricity, which are indispensable for cutting‐edge electronics, energy, and information technologies. The intriguing physical properties of these complex oxides arise from the complex interplay between lattice, orbital, charge, and spin degrees of freedom. Here, it is reviewed how electromechanical properties can be achieved/improved by artificially breaking the symmetry of centrosymmetric oxides via engineering thermodynamic variables such as stress, strain, electric field, and chemical potentials. The mechanisms that have been utilized to break the inherent symmetry of conventional materials that lead to novel functionalities and applications are explored. It is highlighted that access to “hidden phases,” which otherwise are prohibited, could uncover opportunities to host exotic properties, such as piezoelectricity, pyroelectricity, etc. This review not only reports how to engineer intrinsically nonpolar and centrosymmetric oxides for emergent properties, but also has implications for manipulating polar functional materials for better performance. Electromechanical properties can be achieved by breaking the symmetry of the centrosymmetric oxides via engineering thermodynamic variables such as stress/strain, electric field, and chemical potentials. The access to “hidden phases” which are prohibited in the equilibrium phase diagram, could offer opportunities to host exotic properties, such as piezoelectricity, pyroelectricity, etc.
Publisher
John Wiley & Sons, Inc,Wiley-VCH
