Understanding Cooper Pairs and Superconducting Materials

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SUMMARY

Cooper pairs form at the critical temperature (Tc) of superconducting materials, leading to the creation of an energy gap, regardless of whether a current is present. This phenomenon is well-established for conventional superconductors as described by BCS (Bardeen-Cooper-Schrieffer) theory. However, high-temperature superconductors (HTS) exhibit controversial behavior, with some evidence suggesting that ordering may occur above Tc, which challenges traditional BCS explanations.

PREREQUISITES
  • Understanding of superconductivity principles
  • Familiarity with BCS theory
  • Knowledge of critical temperature (Tc) in materials
  • Awareness of high-temperature superconductors (HTS)
NEXT STEPS
  • Research the mechanisms of Cooper pair formation in superconductors
  • Explore the differences between conventional superconductors and high-temperature superconductors
  • Investigate experimental data on superconductivity above critical temperature
  • Study advanced theories beyond BCS for high-temperature superconductivity
USEFUL FOR

Physicists, materials scientists, and engineers interested in superconductivity, particularly those focusing on the behavior of Cooper pairs and high-temperature superconductors.

vabamyyr
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Hi, I have one question about superconducting materials.

Do Cooper pairs form below critical temperature of material or do they form below critical temperature AND if the current exists?
 
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Tc is by definition the temperature at which the Cooper pairs start to form, leading to the creation of an energy gap. Whether or not the superconductor is carrying a current or not is irrelevant.
Note that there is a small caveat; there is some evidence that suggests that this process is not as straighforward in the high-temperature superconductors; there is experimental data that suggests that some form of ordering exisits also above the critical temperature. However, this is still quite controversial.
Also, it is NOT something that can be explained using the BCS theory (which is not valid for HTS anyway). For conventional ("BCS") superconductors the Cooper pairs start to form at Tc.
 
thank you for the answer
 

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