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Proceedings Paper

Defect mechanism of photoinduced superconductivity in YBa2Cu3Ox
Author(s): Denise C. Chew; John F. Federici; J. Gutierrez-Solana; G. Molina; William Savin; W. D. Wilber
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Paper Abstract

Persistent photoconductivity and photoinduced superconductivity have been previously observed in various stoichiometries of YBa2Cu3Ox. The physical mechanism which is responsible for these effects is still under debate. Through an investigation of laser ablated YBa2Cu3Ox thin film compositions, photoluminescence spectra and infrared spectroscopy, the possibility that the mechanism may be defect related has been supported. A correlation between photoluminescence spectra and wavelength dependence support an oxygen defect model of photoinduced persistent conductivity and superconductivity in which the oxygen vacancies act as weakly luminescent F-centers and F+-centers under illumination. Upon infrared illumination the trapped electrons are photoexcited resulting in a partial quenching of the persistent photoconductivity state.

Paper Details

Date Published: 10 June 1996
PDF: 10 pages
Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); doi: 10.1117/12.241780
Show Author Affiliations
Denise C. Chew, New Jersey Institute of Technology (United States)
John F. Federici, New Jersey Institute of Technology (United States)
J. Gutierrez-Solana, New Jersey Institute of Technology (United States)
G. Molina, New Jersey Institute of Technology (United States)
William Savin, New Jersey Institute of Technology (United States)
W. D. Wilber, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 2696:
Spectroscopic Studies of Superconductors
Ivan Bozovic; Dirk van der Marel, Editor(s)

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