Inhibition of Strong-Coupling Superconductivity by Magnetic Impurities: a Quantum Monte Carlo Study
Mark Jarrell
DOI 10.1103/PhysRevLett.61.2612 · Physical Review Letters
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Abstract
The first exact calculation of (∂Tc∂c)c=0, the initial depression of the superconducting Tc, due to a small concentration, c, of magnetic impurities is presented. (∂Tc∂c)c=0 has been calculated from the pair-breaking regime (TKTc0≪1) where the impurities are magnetic, to the pair-weakening regime (TKTc0≫1). I find that (∂Tc∂c)c=0 can be expressed as the product of two universal functions f(λ0) and g(TKTc0), and that, in contrast to previous results, the maximum |(∂Tc∂c)c=0| occurs when Tc0=TK, thus resolving a long-standing experimental puzzle.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 260 | Pressure not reported | unknown |
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