Defect mechanism of photoinduced superconductivity in YBa2Cu3Ox

Denise C. Chew, John F. Federici, J. Gutierrez-Solana, G. Molina, William Savin, W. D. Wilber

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Persistent photoconductivity and photoinduced superconductivity have been previously observed in various stoichiometries of YBa 2Cu 3O x. The physical mechanism which is responsible for these effects is still under debate. Through an investigation of laser ablated YBa 2Cu 3O x 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.

Original languageEnglish (US)
Pages (from-to)654-663
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume2696
Issue number2/-
StatePublished - Dec 1 1996
EventSpectroscopic Studies of Superconductors. Part 2 (of 2) - San Jose, CA, USA
Duration: Jan 29 1996Feb 1 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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