Tunneling measurements on superconductor/insulator/superconductor junctions using single-crystal YBa2Cu3O7−x thin films
- 12 February 1990
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 56 (7), 683-685
- https://doi.org/10.1063/1.103311
Abstract
We have, for the first time, made quasi‐particle tunneling measurements on a YBa2Cu3O7−x(001)/Y2O3 (001)/YBa2 Cu3 O7−x (001)junction, which was epitaxially grown on a MgO(100) substrate in an in‐situ process. Both layers of YBa2 Cu3 O7−x showed the same superconducting transition of Tc end =86 K with ΔT(R=10–90%)=1.5 K. Quasi‐particle tunneling in the direction perpendicular to the Cu‐O planes was measured. A gap parameter Δ(4.5 K) of 9.0±0.2 meV and a value of 2Δ/kTc of 3.5+0.4−0.6 were obtained.Keywords
This publication has 10 references indexed in Scilit:
- Quasiparticle density of states in the perpendicular direction to the Cu-O planes insingle-crystal thin filmsPhysical Review B, 1989
- Infrared evidence for gap anisotropy inPhysical Review Letters, 1989
- Angle-resolved photoemission investigation of the electronic band properties of (001)Physical Review B, 1989
- Tunnel junctions using oxide superconducting thin films epitaxially grown on SrTiO3Applied Physics Letters, 1988
- Observation of gap anisotropy in YBa2Cu3O7−δ by tunnelingPhysica C: Superconductivity and its Applications, 1988
- Single-Crystal YBa2Cu3O7-x Thin Films by Activated Reactive EvaporationJapanese Journal of Applied Physics, 1988
- Fabrication and properties of superconducting device structures in YBa2Cu3O7-xthin filmsJournal of Physics D: Applied Physics, 1987
- Origin of superconductive glassy state and extrinsic critical currents in high-oxidesPhysical Review Letters, 1987
- Tunneling and infrared measurements of the energy gap in the high-critical-temperature superconductor Y-Ba-Cu-OPhysical Review B, 1987
- Tunneling Study of Superconductivity near the Metal-Insulator TransitionPhysical Review Letters, 1984