Abstract
We review work done at UCSD on persistent photoconductivity and photoinduced superconductivity in REBa 2Cu 3O x thin films. It is shown that the resistivity, Hall coefficient and c-axis parameter change significantly upon illumination. All these effects require the presence of oxygen vacancies. The maximum enhancement of the conductivity with illumination occurs for fully deoxygenated samples ( x=6.0). The spectral dependence of the persistent photoconductivity has a pronounced peak in the UV region at ≈4.1 eV. All these observations can be understood qualitatively with a model based on the trapping of photoexcited electrons at oxygen vacancies in the CuO chains of REBa 2Cu 3O x .
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
