Mechanisms of optical response in superconducting YBa2Cu 3O7-δ thin films and grain-boundary weak links

S. Bhattacharya, M. Rajeswari, I. Takeuchi, Z. Trajanovic, Qi Li, X. X. Xi, T. Venkatesan

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9 Scopus citations


The optical response of single grain-boundary weak links in superconducting YBCO thin films has been investigated. At temperatures well below the transition temperature, the grain boundary exhibits an optical response which is qualitatively different from transition edge response. Using a resistively shunted-junction model for the grain-boundary weak link, we find that the optical response below the transition temperature can be described by radiation induced thermal modulation of the critical currents of the weak links. The dependence on the bias current and the temperature distinguishes the weak-link optical response from the transition edge optical response. We discuss novel aspects of a potential radiation detector based on grain-boundary weak-link junctions.

Original languageEnglish (US)
Pages (from-to)5829-5838
Number of pages10
JournalJournal of Applied Physics
Issue number10
StatePublished - Dec 1 1994

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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