AI Article Synopsis
- The study examines how the photoemission spectra of Bi(2)Sr(2)CaCu(2)O(8+delta) change with doping and temperature, showing a notable correlation with superfluid density.
- In the superconducting state, the intensity of photoemission peaks is influenced by superfluid density and condensation energy, suggesting a link between these properties.
- An unexpected sharp change in peak intensity occurs close to the superconducting transition temperature, rather than at the point where the energy gap opens, raising questions about the nature of high-temperature superconductivity.
Article Abstract
We report that the doping and temperature dependence of photoemission spectra near the Brillouin zone boundary of Bi(2)Sr(2)CaCu(2)O(8+delta)exhibit unexpected sensitivity to the superfluid density. In the superconducting state, the photoemission peak intensity as a function of doping scales with the superfluid density and the condensation energy. As a function of temperature, the peak intensity shows an abrupt behavior near the superconducting phase transition temperature where phase coherence sets in, rather than near the temperature where the gap opens. This anomalous manifestation of collective effects in single-particle spectroscopy raises important questions concerning the mechanism of high-temperature superconductivity.
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| http://dx.doi.org/10.1126/science.289.5477.277 | DOI Listing |
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