Asymmetric differential resistance of point contacts on normal-metal-superconductor bilayers
| Autor: | H.F.C. Hoevers, P L H Jennen, M G D van der Grinten, H. van Kempen, P. C. van Son |
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| Rok vydání: | 1994 |
| Předmět: |
Superconductivity
Condensed matter physics Chemistry Band gap media_common.quotation_subject Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Asymmetry Andreev reflection Metal visual_art visual_art.visual_art_medium High Energy Physics::Experiment General Materials Science Differential (mathematics) media_common |
| Zdroj: | Journal of Physics: Condensed Matter. 6:65-72 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/0953-8984/6/1/008 |
| Popis: | Point-contact junctions on normal-metal-superconductor bilayers show asymmetries of different magnitudes and signs in the differential resistance versus voltage curves for opposite-bias voltages. In the absence of Andreev reflection (i.e. for energies outside the energy gap) no asymmetry is found. The asymmetries are investigated with Ag, Cu, Pd, Pt, Ni, and Co as point-contact material on Ag-Pb bilayers. For all materials the authors provide the statistics of the asymmetries. They discuss effects that may be responsible for this new phenomenon. |
| Databáze: | OpenAIRE |
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