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Superconducting fluctuation effect in CaFe0.88Co0.12AsF.

H Xiao1, B Gao, Y H Ma

  • 1Center for High Pressure Science and Technology Advanced Research, Beijing, 100094, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|September 14, 2016
PubMed
Summary
This summary is machine-generated.

Superconducting fluctuations were observed in CaFe0.88Co0.12AsF single crystals, similar to cuprates. The material

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Superconductivity

Background:

  • CaFe0.88Co0.12AsF is a pnictide superconductor.
  • Understanding the nature of superconductivity in iron-based superconductors is crucial.
  • Comparison with cuprate superconductors provides insights into exotic superconducting mechanisms.

Purpose of the Study:

  • To investigate the superconducting properties of CaFe0.88Co0.12AsF single crystals.
  • To explore the presence and characteristics of superconducting fluctuations.
  • To compare the superconducting behavior with high-T c cuprates.

Main Methods:

  • Out-of-plane angular dependent torque measurements.
  • Analysis of magnetic field enhanced and temperature dependent diamagnetism.
  • Investigation of the relationship between critical temperature (T c) and superfluid density.

Main Results:

  • Superconducting fluctuations were observed above the critical temperature (T c).
  • These fluctuations exhibit magnetic field enhanced and exponentially temperature dependent diamagnetism.
  • The ratio of T c to superfluid density aligns with the Uemura line, characteristic of high-T c cuprates.

Conclusions:

  • Superconducting fluctuations in CaFe0.88Co0.12AsF share similarities with cuprate superconductors.
  • The adherence to the Uemura line suggests an exotic nature of superconductivity in this material.
  • Further research is warranted to elucidate the underlying pairing mechanism.