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Related Experiment Videos

Sum rules and interlayer conductivity of high-Tc cuprates

Basov1, Woods, Katz

  • 1D. N. Basov, S. I. Woods, A. S. Katz, E. J. Singley, R. C. Dynes, Department of Physics, University of California-San Diego, La Jolla, CA 92093-0319, USA. M. Xu, James Franck Institute, University of Chicago, Chicago, IL 60637, USA. D. G. Hinks,

Science (New York, N.Y.)
|January 5, 1999
PubMed
Summary

Superconducting condensates in cuprates exhibit a large energy scale in the mid-infrared range, suggesting a change in kinetic energy during the superconducting transition.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Superconductivity

Background:

  • Cuprate high-transition temperature superconductors exhibit unique electronic properties.
  • Understanding the nature of the superconducting condensate is crucial for advancing superconductor technology.

Purpose of the Study:

  • To analyze the interlayer infrared conductivity of cuprate superconductors.
  • To investigate the energy scale of the superconducting condensate in the mid-infrared frequency range.

Main Methods:

  • Analysis of interlayer infrared conductivity.
  • Examination of mid-infrared range condensation using sum rules for complex conductivity.

Main Results:

  • An anomalously large energy scale was observed up to mid-infrared frequencies.

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  • This effect is attributed to the formation of the superconducting condensate.
  • The phenomenon was observed in various cuprate materials like Tl2Ba2CuO6+x, La2-xSrxCuO4, and YBa2Cu3O6.6.

    • Conclusions:

    • The observed mid-infrared condensation provides insights into the superconducting condensate.
    • A possible interpretation involves a change in kinetic energy associated with the superconducting transition.