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Related Experiment Videos

Singular current response from isolated impurities in d-wave superconductors.

Shan-Wen Tsai1, P J Hirschfeld

  • 1Department of Physics, University of Florida, P.O. Box 118440, Gainesville, Florida 32611, USA.

Physical Review Letters
|October 9, 2002
PubMed
Summary

The study reveals a singular low-temperature response in d-wave superconductors with impurities. This impurity scattering can cause a 1/T upturn in penetration depth, potentially observable in cuprate materials.

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Area of Science:

  • Condensed Matter Physics
  • Superconductivity Theory

Background:

  • D-wave superconductors exhibit complex electronic properties.
  • Understanding impurity effects is crucial for characterizing superconducting behavior.

Purpose of the Study:

  • To investigate the low-temperature response of d-wave superconductors with single impurities.
  • To analyze the impact of impurity scattering on the penetration depth.

Main Methods:

  • Theoretical calculation of the superconducting response.
  • Analysis of the low-temperature limit and scattering effects.

Main Results:

  • A singular response was found in the low-temperature limit.
  • Strong scattering leads to a 1/T term in penetration depth (lambda(T)).

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  • This behavior mimics effects from Andreev surface bound states.

    • Conclusions:

    • The calculated low-temperature upturn in penetration depth is a direct consequence of impurity scattering.
    • This phenomenon is potentially observable in cuprate superconductors with a small number of impurities.