Study of YBCO/Au Surface Using Low-Temperature Scanning Tunneling Microscopy/Scanning Tunneling Spectroscopy
- 1 November 1992
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 31 (11R) , 3525-3528
- https://doi.org/10.1143/jjap.31.3525
Abstract
A low-temperature scanning tunneling microscope (LTSTM) has been used to study the surface electronic state of a 30-nm-thick Au film deposited on (103)-oriented YBCO thin film. Conductance spectra with the BCS-like dip induced by the superconductivity proximity effect were observed in a small area. Also, spectra with zero-bias conductance peaks were observed in another limited area. Most parts of the areas studied showed constant conductance spectra. Since this fact suggests the existence of a degraded layer on most surfaces of the YBCO film, the Josephson coupling in YBCO/Au/Nb is assumed to occur primarily in this degraded layer.Keywords
This publication has 18 references indexed in Scilit:
- Experimental observation of scattering of tunneling electrons by a single magnetic momentPhysical Review Letters, 1992
- Zero bias anomalies in YBa2Cu3O7 tunnel junctionsPhysica C: Superconductivity and its Applications, 1992
- Tunneling study on copper oxide N-S bi-layer systemPhysica C: Superconductivity and its Applications, 1991
- Tunnel gap structure and tunneling model of the anisotropic YBaCuO/I/Pb junctionsPhysica C: Superconductivity and its Applications, 1991
- Towards the quantitative theory of the high-T/sub c/ Josephson junctionsIEEE Transactions on Magnetics, 1991
- Scanning tunneling spectroscopic studies of superconducting NbN single crystal thin films at 4.2 KIEEE Transactions on Magnetics, 1991
- Tunneling measurements of the zero-bias conductance peak and the Bi-Sr-Ca-Cu-O thin-film energy gapPhysical Review Letters, 1991
- Fabrication of S-N-S Josephson junctions of Y-Ba-Cu-O/Au/Nb thin film sandwichesIEEE Transactions on Magnetics, 1989
- Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversionPhysical Review B, 1982
- Zero-Bias Tunneling Anomalies—Temperature, Voltage, and Magnetic Field DependencePhysical Review B, 1968