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http://hdl.handle.net/10397/95697
Title: | Oxygen vacancy and photoelectron enhanced flexoelectricity in perovskite SrTiO3 crystal | Authors: | Jin, Y Zhang, F Zhou, K Suen, CH Zhou, XY Dai, JY |
Issue Date: | 19-Apr-2021 | Source: | Applied physics letters, 19 Apr. 2021, v. 118, no. 16, 164101 | Abstract: | Photo-enhanced flexoelectricity or flexoelectricity-enhanced photovoltaic effect, named photo-flexoelectric, is an interesting topic and has application potential in photo-electro-mechanical devices. However, this effect is far from being well understood. In this work, we demonstrate the photoflexoelectric effect in perovskite-structured SrTiO3 (STO) single crystal and reveal the coupling mechanism between its photovoltaic and flexoelectric effect. Driven by the flexoelectric field, light-induced electrons can tunnel through the Schottky junction at the Au/STO interface, giving rise to enhanced flexoelectricity, i.e., photoflexoelectric effect. Thermal annealing in vacuum induces oxygen vacancies in STO and results in stronger light absorption and enlarged photoflexoelectric effect. | Publisher: | American Institute of Physics | Journal: | Applied physics letters | ISSN: | 0003-6951 | EISSN: | 1077-3118 | DOI: | 10.1063/5.0047735 | Rights: | © 2021 Author(s). |
Appears in Collections: | Journal/Magazine Article |
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164101_1_online.pdf | 1.64 MB | Adobe PDF | View/Open |
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