Tunneling spectroscopy of a La-Sr-Cu-O break junction: Evidence for strong-coupling superconductivity
- 1 June 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (16), 8711-8713
- https://doi.org/10.1103/physrevb.35.8711
Abstract
Detailed structure in the quasiparticle tunneling has been observed in La-Sr-Cu-O superconductive tunneling junctions using the break-junction technique. Variability in the energy gap and associated structure in the current-voltage curves is observed indicating significant inhomogeneity in the superconducting properties. Large energy gaps (7.0 meV) and deep structure in the conductance derivatives are evidence for a strong-coupling mechanism.Keywords
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