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 —f(λο), 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.
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Jarrel, M. (1990). Universal Reduction of T c in Strong Coupling Superconductors due to Anderson/Kondo Impurities. In: Landau, D.P., Mon, K.K., Schüttler, HB. (eds) Computer Simulation Studies in Condensed Matter Physics II. Springer Proceedings in Physics, vol 45. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-75234-6_12
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DOI: https://doi.org/10.1007/978-3-642-75234-6_12
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