title: Structural and electrical characterization of ultra-thin SrTiO3 tunnel barriers grown over YBa2Cu3O7 electrodes for the development of high Tc Josephson junctions.
abstract: The transport properties of ultra-thin SrTiO(3) (STO) layers grown over YBa(2)Cu(3)O(7) electrodes were studied by conductive atomic force microscopy at the nano-scale. A very good control of the barrier thickness was achieved during the deposition process. A phenomenological approach was used to obtain critical parameters regarding the structural and electrical properties of the system. The STO layers present an energy barrier of 0.9 eV and an attenuation length of 0.23 nm, indicating very good insulating properties for the development of high-quality Josephson junctions.
authors.affiliation: Centro Atómico Bariloche, Instituto Balseiro-CNEA, Universidad Nacional de Cuyo, Bariloche, Rio Negro, Argentina. lavilesf@gmail.com
authors.forename: L Avilés
authors.initials: LA
authors.lastname: Félix
authors.forename: M
authors.initials: M
authors.lastname: Sirena
authors.forename: L A Agüero
authors.initials: LA
authors.lastname: Guzmán
authors.forename: J González
authors.initials: JG
authors.lastname: Sutter
authors.forename: S Pons
authors.initials: SP
authors.lastname: Vargas
authors.forename: L B
authors.initials: LB
authors.lastname: Steren
authors.forename: R
authors.initials: R
authors.lastname: Bernard
authors.forename: J
authors.initials: J
authors.lastname: Trastoy
authors.forename: J E
authors.initials: JE
authors.lastname: Villegas
authors.forename: J
authors.initials: J
authors.lastname: Briático
authors.forename: N
authors.initials: N
authors.lastname: Bergeal
authors.forename: J
authors.initials: J
authors.lastname: Lesueur
authors.forename: G
authors.initials: G
authors.lastname: Faini
mesh_terms: D004553:Electric Conductivity; D004867:Equipment Design; D019544:Equipment Failure Analysis; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D008839:Microelectrodes; D008968:Molecular Conformation; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D012666:Semiconductors; D013324:Strontium / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D010087:Oxides; D014025:Titanium; C119252:strontium titanium oxide; D013324:Strontium