Light-induced capacitance tunability in ferroelectric crystals
The remote controlling of ferroic properties with light is nowadays a hot and highly appealing topic in materials science. Here, we shed light on some of the unresolved issues surrounding light–matter coupling in ferroelectrics. Our findings show that the capacitance and, consequently, its related i...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/120450 |
| Acceso en línea: | https://hdl.handle.net/2117/120450 https://dx.doi.org/10.1021/acsami.8b07784 |
| Access Level: | acceso abierto |
| Palabra clave: | Ferroelectric crystals Optical detectors barium titanate capacitance tunability ferroelectric crystals light-induced phenomena photodetectors Cristalls ferroelectrics Detectors òptics Àrees temàtiques de la UPC::Física |
| Sumario: | The remote controlling of ferroic properties with light is nowadays a hot and highly appealing topic in materials science. Here, we shed light on some of the unresolved issues surrounding light–matter coupling in ferroelectrics. Our findings show that the capacitance and, consequently, its related intrinsic material property, i.e., the dielectric constant, can be reversibly adjusted through the light power control. High photodielectric performance is exhibited across a wide range of the visible light wavelength because of the wavelength-independence of the phenomenon. We have verified that this counterintuitive behavior can be strongly ascribed to the existence of “locally free charges” at domain wall. |
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