Photoemission Spectroscopy of the Strong-Coupling Superconducting Transitions in Lead and Niobium
- 28 August 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (9) , 1966-1969
- https://doi.org/10.1103/physrevlett.85.1966
Abstract
We study the changes in the electronic structure associated with low- strong-coupling superconducting transitions in Pb and Nb using ultrahigh-resolution (2.3 meV) temperature-dependent (5.3–12.0 K) photoemission spectroscopy. We observe peaks in the density of states on entering the superconducting-phase accompanying gap formation and spectacular redistribution of spectral weight at low energy scales as a function of temperature. The well-known peak-dip feature of the high- cuprates is seen in Pb, making it a characteristic of strong-coupling superconductivity.
Keywords
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