Fiske steps and hysteresis in YBa2Cu3O7 grain boundary Josephson junctions: Structural information of the barrier by means of a nondestructive approach
| Autor: | M. A. Navacerrada, 1 M. L. Lucía, 2 F. Sánchez-Quesada, 2, E. Sarnelli3 |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Permittivity
Josephson effect High-temperature superconductivity General Physics and Astronomy Insulator (electricity) 02 engineering and technology 01 natural sciences Capacitance law.invention law Nondestructive testing Condensed Matter::Superconductivity 0103 physical sciences 010306 general physics Physics Superconductivity Materiales Condensed matter physics business.industry Física 021001 nanoscience & nanotechnology Grain boundary Electrónica Electricidad 0210 nano-technology business |
| Zdroj: | Journal of applied physics 104 (2008): 113915. doi:10.1063/1.3040083 info:cnr-pdr/source/autori:M. A. Navacerrada,1 M. L. Lucía,2 F. Sánchez-Quesada,2 and E. Sarnelli3/titolo:Fiske steps and hysteresis in YBa2Cu3O7 grain boundary Josephson junctions: Structural information of the barrier by means of a nondestructive approach/doi:10.1063%2F1.3040083/rivista:Journal of applied physics/anno:2008/pagina_da:113915/pagina_a:/intervallo_pagine:113915/volume:104 E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid E-Prints Complutense. Archivo Institucional de la UCM instname Journal of Applied Physics, ISSN 0021-8979, 2008-12, Vol. 104, No. 11 Archivo Digital UPM Universidad Politécnica de Madrid |
| DOI: | 10.1063/1.3040083 |
| Popis: | A deep analysis of the current-voltage (I-V) characteristics of YBa2Cu3O7 grain boundary Josephson junctions (GBJJs) allows us to go much farther than the usual calculus of the transport parameters. It is possible to construct a structural image of the barrier by an exhaustive and complementary analysis of both transport and electromagnetic parameters obtained from I-V curves. For such an approach, we have chosen the following three representative bicrystalline geometries: 24 degrees [001] asymmetric, 45 degrees [100] asymmetric, and 24 degrees [001] symmetric +45 degrees [100] asymmetric. The dependence of the product ICRN on the junction normal resistance is of the ICRN-1 type pointing to a SNINS model (S denotes superconductor, I denotes insulator, and N denotes normal metal) for all our GBJJs. A satisfactory explanation of the discrepancy of the capacitance of the barrier estimated from Fiske resonance positions and hysteresis in the I-V curves needs of such a model. Moreover an estimation of the length of the normal regions adjacent to the crystallographic barrier can be made. This comparative analysis is presented in order to extract interesting information about the particular transport mechanisms involved in these GBJJs. |
| Databáze: | OpenAIRE |
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