Josephson systems based on ballistic point contacts between single-band and multi-band superconductors
| Autor: | Y. S. Yerin, Evgeni Il'ichev, A. N. Omelyanchouk, A. S. Kiyko |
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| Rok vydání: | 2015 |
| Předmět: |
Superconductivity
Physics Josephson effect Physics and Astronomy (miscellaneous) Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity General Physics and Astronomy FOS: Physical sciences Magnetic flux Symmetry (physics) Maxima and minima Superconductivity (cond-mat.supr-con) Ballistic conduction Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Symmetry breaking Ground state |
| Zdroj: | Scopus-Elsevier |
| DOI: | 10.48550/arxiv.1512.03170 |
| Popis: | The Josephson effect in ballistic point contacts between single-band and multi-band superconductors was investigated. It was found that in the case of Josephson junctions formed by a single-band and an $s_\pm$-wave two-band superconductor as well as by a single-band and a three-band superconductor the junctions become frustrated, demonstrating the $\phi$-contact properties. Depending on the ground state of a three-band superconductor with broken time-reversal symmetry (BTRS), the Josephson junction can have from one to three energy minima, some of which can be locally stable. We also study the behavior of a dc SQUID based on the Josephson junctions between single-band and multi-band superconductors. Some features on the dependences of the critical current and the total magnetic flux on the applied flux of a dc SQUID based on the Josephson point contacts between a single-band superconductor and an $s_\pm$-wave superconductor, three-band superconductor with BTRS and three-band superconductor without BTRS as compared to the conventional dc SQUIDs based on single-band superconductors were found. The results can be used as an experimental tool to detect the existence of multi-band structure and BTRS. Comment: 23 pages, 11 figures |
| Databáze: | OpenAIRE |
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