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- Tagliacozzo, A. (author)
Mesoscopic conductance fluctuations in YBa2Cu3O7-delta grain boundary junctions at low temperature
- Article/chapterEnglish2009
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- 2009
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- LIBRIS-ID:oai:research.chalmers.se:e1a2b03d-5748-43e8-bb2e-7172fa62630a
- https://doi.org/10.1103/PhysRevB.79.024501DOI
- https://research.chalmers.se/publication/115149URI
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- Language:English
- Summary in:English
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Notes
- The magnetoconductance in YBa2Cu3O7-delta grain boundary Josephson junctions displays fluctuations at low temperatures of mesoscopic origin. The morphology of the junction suggests that transport occurs in narrow channels across the grain boundary line with a large Thouless energy. Nevertheless the measured fluctuation amplitude decreases quite slowly when increasing the voltage up to values about 20 times the Thouless energy, of the order of the nominal superconducting gap. Our findings show the coexistence of supercurrent and quasiparticle current in the junction conduction even at high nonequilibrium conditions. Model calculations confirm the reduced role of quasiparticle relaxation at temperatures up to 3 K.
Subject headings and genre
- NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
- Josephson effect
- links
- magnetic-field
- magnetoresistance
- josephson-junctions
- superconductors
- yttrium compounds
- weak
- thin-films
- barium compounds
- noise
- grain boundaries
- quasi-particles
- transport
- disordered electronic systems
- fluctuations in superconductors
- high-temperature superconductors
- superconducting energy gap
- metals
- copper compounds
Added entries (persons, corporate bodies, meetings, titles ...)
- Tafuri, F. (author)
- Gambale, E. (author)
- Jouault, B. (author)
- Born, D. (author)
- Lucignano, P. (author)
- Stornaiuolo, D. (author)
- Lombardi, Floriana,1967Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lombardi (author)
- Barone, A. (author)
- Altshuler, B. L. (author)
- Chalmers tekniska högskola (creator_code:org_t)
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- In:Physical Review B - Condensed Matter and Materials Physics79:22469-99502469-9969
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