Modification of the isotope effect due to pair breaking

1 April 1991

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 66 (13) , 1789-1792
https://doi.org/10.1103/physrevlett.66.1789

Abstract

We have calculated the effect of pair breaking on the isotope-effect coefficient (β) of a superconductor. We find that, as the pair-breaking scattering rate is increased, β also increases in absolute value. Values of β much larger than the canonical value of 1/2 can easily be achieved even in models where the electron-phonon interaction contributes only a very small amount to the value of the intrinsic critical temperature.

Keywords

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