title: Scanning tunneling spectroscopy of Bi(2)Sr(2)CuO(6+delta): new evidence for the common origin of the pseudogap and superconductivity.
abstract: Using scanning tunneling spectroscopy, we investigated the temperature dependence of the quasiparticle density of states of overdoped Bi(2)Sr(2)CuO(6+delta) between 275 mK and 82 K. Below T(c) = 10 K, the spectra show a gap with well-defined coherence peaks at +/-Delta(p) approximately 12 meV, which disappear at T(c). Above T(c), the spectra display a clear pseudogap of the same magnitude, gradually filling up and vanishing at T(*) approximately 68 K. The comparison with Bi(2)Sr(2)CaCu(2)O(8+delta) demonstrates that the pseudogap and the superconducting gap scale with each other, providing strong evidence that they have a common origin.
authors.affiliation: DPMC, Université de Genève, 24, Quai Ernest-Ansermet, 1211 Genèva, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Kugler
authors.lastname: Fischer Ø
authors.forename: C
authors.initials: C
authors.lastname: Renner
authors.forename: S
authors.initials: S
authors.lastname: Ono
authors.forename: Y
authors.initials: Y
authors.lastname: Ando