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- Title
Andreev States and Shot Noise in Bicrystal Junctions of Cuprate Superconductors.
- Authors
Borisenko, I. V.; Constantinian, K. Y.; Kislinski&icaron;, Yu. V.; Ovsyannikov, G. A.
- Abstract
Experimentally observed features of the electrical and noise characteristics of bicrystal junctions of cuprate superconductors, such as linearity of the critical current density versus square root of the junction transparency and increase in the spectral density of shot noise for small bias voltages (below the superconducting gap), indicate that the superconducting current in cuprate bicrystal junctions is determined by the passage of quasi-particles through a potential barrier at the superconductor boundaries. This process involves bound states appearing as a result of multiple Andreev reflections in superconductors with dominant wavefunction components of the dx2–y2 symmetry type. At the same time, interpretation of the experimental current–phase and current–magnetic field curves requires that the character of faceting at the bicrystal junctions would be also taken into account. © 2004 MAIK “Nauka/Interperiodica”.
- Subjects
SUPERCONDUCTORS; SOLID state electronics; ELECTRONIC materials; PARTICLES (Nuclear physics); PHYSICS
- Publication
Journal of Experimental & Theoretical Physics, 2004, Vol 99, Issue 6, p1223
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/1.1854810