title: Influence of disorder on the local density of states in high- T(c) superconducting thin films
abstract: Using a low temperature scanning tunneling microscope in the spectroscopic mode, we find that the disorder in a Bi(2)Sr(2)CaCu(2)O(8+delta) thin film modifies dramatically the quasiparticle local density of states. Small, but well-defined superconducting regions, coexisting with dominating semiconducting areas, show well-pronounced gap structures, similar to those observed previously in high-quality single crystals. Surprisingly, between these two regions, the detailed shape of the quasiparticle spectrum is virtually identical to the pseudogap previously observed at temperatures T>T(c), or in the vortex core, at 4.2 K. Thus, the role of the disorder in destroying the superconducting phase is comparable to that of the magnetic field or thermal fluctuations.
authors.affiliation: Groupe de Physique des Solides, Universites Paris 7 et Paris 6, Unite Mixte de Recherche C.N.R.S. (UMR 75 88), 2 Place Jussieu, 75251 Paris Cedex 5, France.
authors.initials: T
authors.lastname: Cren
authors.initials: D
authors.lastname: Roditchev
authors.initials: W
authors.lastname: Sacks
authors.initials: J
authors.lastname: Klein
authors.initials: J
authors.lastname: Moussy
authors.initials: C
authors.lastname: Deville-Cavellin
authors.initials: M
authors.lastname: Lagues