Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
67 (1995), S. 1775-1777
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have investigated superconductor–normal metal–superconductor junctions with metallic perovskite SrRuO3 barriers. Ramp-type junctions with ion-beam-etched and wet-chemical-etched YBa2Cu3O7 (YBCO) ramps have been compared with planar junctions where the interfaces were fabricated completely in situ. Regardless of the fabrication method, the junction properties were determined not by the metallic SrRuO3 barrier, but by an insulating layer at the interface. The shape of the I–V curves, and the temperature dependence of the normal resistance of junctions, could be well explained by quasiparticle resonant tunneling via two localized states in the interface layer. Furthermore, a model for the Cooper pair transport will be discussed that assumes resonant tunneling via one localized state as transport mechanism. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.114379
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