A quantitative model for IcR product in d-wave Josephson junctions
| Autor: | Yokoyama, T., Sawa, Y., Tanaka, Y., Golubov, A. A., Maeda, A., Fujimaki, A. |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 76, 052508 (2007) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.76.052508 |
| Popis: | We study theoretically the Josephson effect in d-wave superconductor / diffusive normal metal /insulator/ diffusive normal metal/ d-wave superconductor (D/DN/I/DN/D) junctions. This model is aimed to describe practical junctions in high-$T_C$ cuprate superconductors, in which the product of the critical Josephson current ($I_C$) and the normal state resistance ($R$) (the so-called $I_{\rm C}R$ product) is very small compared to the prediction of the standard theory. We show that the $I_{\rm C}R$ product in D/DN/I/DN/D junctions can be much smaller than that in d-wave superconductor / insulator / d-wave superconductor junctions and formulate the conditions necessary to achieve large $I_{\rm C}R$ product in D/DN/I/DN/D junctions. The proposed theory describes the behavior of $I_{\rm C}R$ products quantitatively in high-$T_{\rm C}$ cuprate junctions. Comment: 4 pages, 6 figures |
| Databáze: | arXiv |
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