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Universal Reduction of Tc in Strong Coupling Superconductors due to Anderson/Kondo Impurities

  • M. Jarrel
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 45)

Abstract

The first exact calculation of (∂Tc/∂c)c=0, the initial depression of the superconducting T c , due to a small concentration, c, of magnetic impurities is presented. N(0) (∂T c /∂c) c=0 can be expressed as the product of two functions —fο), and g(T K /T co ). I find that f decreases rapidly and monotonically with λο, indicating that magnetic impurities reduce T c most effectively in weak coupling superconductors. I also find that, in contrast to previous results, the maximum ∣ (∂T c /∂c)c=0 ∣ occurs when T co = T K , thus resolving a longstanding experimental puzzle.

Keywords

Anderson Model Magnetic Impurity Weak Coupling Limit Single Impurity Monte Carlo Data 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • M. Jarrel
    • 1
  1. 1.The Ohio State UniversityColumbusUSA

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