Abstract
Recent muon spin rotation (μ+SR) spectroscopy of YBa2Cu3O7 finds that the superconductivity (i) is consistent with nodeless pairing (e.g., s-wave or extended s-wave), after fluxon-pinning is taken into account, and (ii) is well-described by a two-fluid model. These are the same results as found over a decade ago in samples with strongly pinned vortices. As compared with the two-fluid fit, the probability of the same quality fit to the recent data, assuming a d-wave model, was found to be nearly 4x10-6. Clearly YBa2Cu3O7 is a nodeless, strong-coupling superconductor.
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Dow, J., Harshman, D.R., Fiory, A.T. (2007). II.2 Cuprate and other unconventional superconductors. In: Scharnberg, K., Kruchinin, S. (eds) Electron Correlation in New Materials and Nanosystems. NATO Science Series, vol 241. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5659-8_20
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DOI: https://doi.org/10.1007/978-1-4020-5659-8_20
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