Persistent photoinduced superconductivity

A. Hoffmann, J. Hasen, D. Lederman, T. Endo, Y. Bruynseraede, Ivan K. Schuller

Research output: Contribution to journalArticlepeer-review


We review work done at UCSD on persistent photoconductivity and photoinduced superconductivity in REBa2Cu3Ox 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 Cu-O chains of REBa2Cu3Ox.

Original languageEnglish (US)
Pages (from-to)87-93
Number of pages7
JournalJournal of Alloys and Compounds
Issue number1-2
StatePublished - Apr 1997
Externally publishedYes


  • High-T
  • Photoconductivity
  • Superconductors
  • Thin film

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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