Tunneling spectroscopy study of YBa sub 2 Cu sub 3 O sub 7 thin films using a cryogenic scanning tunneling microscope

Technical Report · Tue May 01 00:00:00 EDT 1990

OSTI ID:5809484

Wilkins, R; Amman, M; Soltis, R E; Ben-Jacob, E; Jaklevic, R C

We have measured reproducible tunneling spectra on YBa{sub 2}Cu{sub 3}0{sub 7} thin films with a cryogenic scanning tunneling microscope. We find that the I-V curves are generally of three types. The most common type, featured in a large majority of the data, shows a region of high conductance at zero bias. The amplitude of this region is inversely proportional to the tunneling resistance between the tip and sample. It is possible that this can be explained in terms of Josephson effects with the films, although an alternative is given based on electronic self-energy corrections. Data showing capacitive charging steps are analyzed in terms of two ultrasmall tunnel junctions in series.

• Research Organization: Michigan Univ., Ann Arbor, MI (USA). Center for High Frequency Microelectronics
• OSTI ID: 5809484
• Report Number(s): AD-A-230830/2/XAB; CNN: DAAL03-87-K-0007
• Resource Relation: Other Information: Pub. in Physical Review B, v41 n13 p8904-8911, 1 May 90
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
TUNNEL EFFECT
COPPER OXIDES
YTTRIUM OXIDES
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
MICROSCOPES
SPECTRA
SPECTROSCOPY
THIN FILMS
TUNNELING
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
FILMS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity