Numerical study of multi-hole SQUIDs using Bi2Sr2CaCu2O8+δ intrinsic Josephson junctions
| Autor: | Akinobu Irie, Michihide Kitamura, Gin-ichiro Oya |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Josephson effect
Superconductivity Flux pinning Condensed matter physics Energy Engineering and Power Technology Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Magnetic field SQUID Pi Josephson junction law Condensed Matter::Superconductivity Magnetic flux quantum Electrical and Electronic Engineering Type-II superconductor |
| Zdroj: | Physica C: Superconductivity. 470:582-591 |
| ISSN: | 0921-4534 |
| Popis: | The I – V characteristics and the resultant total energies have been calculated full numerically for the parallel arranged multi-hole superconducting quantum interference devices (SQUIDs) consisting of Bi 2 Sr 2 CaCu 2 O 8+ δ high- T c superconductors intrinsic Josephson junctions (BSCCO–IJJs). It has been found that (I) the effect of charge coupling between neighboring Josephson junctions is not so important, (II) the effect of noise is not so crucial except for the case of low β L and no external magnetic field, and (III) a reliable external magnetic field dependence is obtained when the β L is less than about 0.5, where the β L is a dimensionless parameter defined by L loop I c / Φ 0 using a loop inductance L loop of a SQUID, a critical current I c of a junction, and a flux quantum Φ 0 . We have pointed out that (IV) the steps which differ from Shapiro steps are found when an external ac modulation current is applied to the parallel arranged multi-hole SQUIDs, and (V) the I – V characteristics of a double hole BSCCO–IJJs–SQUID trapping a flux quantum can be controlled as a function of the external magnetic field. |
| Databáze: | OpenAIRE |
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