Do Oxide Superconductors Behave as Fermi Liquids?
DOI: 10.1063/1.2810482
When a photon knocks an electron out of a material, the freed electron reveals some secrets about the electronic environment it left behind. Such clues are sought by theorists puzzling over the mechanisms for high‐temperature superconductivity, but high‐resolution data have only become available in the past year. The behavior they reveal resembles the familiar patterns of conventional superconductors in the normal states—but with subtle and complex deviations that are now the focus of intense theoretical attention. The data have confirmed earlier measurements of a superconducting gap and provided direct evidence for a Fermi edge in momentum space.
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