Infrared spectra and the energy gap in thin film YBa2Cu3O7-δ

Steven L. Herr, K. Kamaras, C. D. Porter, N. Tache, D. B. Tanner, S. Etemad, T. Venkatesan, E. Chase, A. Inam, X. D. Wu, M. S. Hedge, B. Dutta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Interpretations of IR and millimeter wave measurements in superconductors are generally carried out in terms of the Mattis-Bardeen calculations, which apply either to the anomalous skin effect regime or to the dirty limit regime. In high temperature superconductors neither limit applies. Reflectance measurements on high quality, epitaxially-grown, laser-deposited films indicate that these samples are in the clean-limit, normal skin effect regime. Features that have been previously identified as the gap appear in both the superconducting and the normal-state spectra, although obscured by the free carrier absorption above Tc. Below Tc these features become more evident as the free carrier contribution condenses into a delta function at zero frequency.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsKul B. Bhasin, Vernon O. Heinen
PublisherPubl by Int Soc for Optical Engineering
Pages44-51
Number of pages8
ISBN (Print)0819403431
Publication statusPublished - Dec 1 1990
EventSuperconductivity Applications for Infrared and Microwave Devices - Orlando, FL, USA
Duration: Apr 19 1990Apr 20 1990

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1292
ISSN (Print)0277-786X

Other

OtherSuperconductivity Applications for Infrared and Microwave Devices
CityOrlando, FL, USA
Period4/19/904/20/90

ASJC Scopus subject areas

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

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  • Cite this

    Herr, S. L., Kamaras, K., Porter, C. D., Tache, N., Tanner, D. B., Etemad, S., Venkatesan, T., Chase, E., Inam, A., Wu, X. D., Hedge, M. S., & Dutta, B. (1990). Infrared spectra and the energy gap in thin film YBa2Cu3O7-δ. In K. B. Bhasin, & V. O. Heinen (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (pp. 44-51). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1292). Publ by Int Soc for Optical Engineering.