Isotope effect for the penetration depth in superconductors
- Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States)
- Naval Research Laboratory, Washington, D.C. 20375-5343 (United States)
We show that various factors can lead to an isotopic dependence of the penetration depth {delta}. Nonadiabaticity (Jahn-Teller crossing) leads to the isotope effect of the charge-carrier concentration n and, consequently, of {delta} in doped superconductors such as the cuprates. A general equation relating the isotope coefficients of T{sub c} and of {delta} is presented for London superconductors. We further show that the presence of magnetic impurities or a proximity contact also lead to an isotopic dependence of {delta}; the isotope coefficient turns out to be temperature dependent, {beta}(T), in these cases. The existence of the isotope effect for the penetration depth is predicted for conventional as well as for high-temperature superconductors. Various experiments are proposed and/or discussed. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 601009
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 57; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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