Published May 1996
| Version v1
Journal article
Study of the proximity effect in Nb/Au, Bi2Sr2CaCu2O8+y/Au, and HgBa2CuO4/Ag using a scanning tunneling microscope
- 1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Description
Proximity effect gaps were observed consistently in Nb/Au, Bi2Sr2CaCu2O8+y/Au, and HgBa2CuO4/Ag bilayers using a low temperature scanning tunneling microscope. The Nb/Au conductance curves [dI(V)/dV vs V] were fit by the Arnold model, using the accepted energy gap value of Nb, 1.55 meV. The application of gold and silver overlayers allowed vacuum tunneling and topographic images of BSCCO single crystals and the HgBa2CuO4 polycrystalline sample. Cleavage steps of varying sizes (up to 1500 A) in the BSCCO/Au sample were observed, and gaplike features were found on such steps. Consistent, reproducible energy gaps were also found in the Hg-compound sample. copyright 1996 American Institute of Physics
Additional details
Publishing Information
- Journal Title
- Journal of Applied Physics
- Journal Volume
- 79
- Journal Issue
- 10
- Journal Page Range
- p. 7843-7848.
- ISSN
- 0021-8979
- CODEN
- JAPIAU
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 27074314
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; ELECTRON MICROSCOPY; ENERGY GAP; GOLD; MERCURY OXIDES; NIOBIUM; PROXIMITY EFFECT; STRONTIUM OXIDES; SUPERCONDUCTING JUNCTIONS; TUNNEL EFFECT
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELEMENTS; MERCURY COMPOUNDS; METALS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS