title: Evidence for coexistence of the superconducting gap and the pseudogap in Bi-2212 from intrinsic tunneling spectroscopy.
abstract: We present intrinsic tunneling spectroscopy measurements on small Bi2Sr2CaCu2O8+x mesas. The tunnel conductance curves show both sharp peaks at the superconducting gap voltage and broad humps representing the c-axis pseudogap. The superconducting gap vanishes at Tc, while the pseudogap exists both above and below Tc. Our observation implies that the superconducting and pseudogaps represent different coexisting phenomena.
authors.affiliation: Department of Microelectronics and Nanoscience, Chalmers University of Technology, S-41296 Göteborg, Sweden.
authors.forename: V M
authors.initials: VM
authors.lastname: Krasnov
authors.forename: A
authors.initials: A
authors.lastname: Yurgens
authors.forename: D
authors.initials: D
authors.lastname: Winkler
authors.forename: P
authors.initials: P
authors.lastname: Delsing
authors.forename: T
authors.initials: T
authors.lastname: Claeson