Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents
In this work, we effectuated the numerical simulations of the phase dynamics of an array of Josephson junctions taking into account the capacitive coupling between the neighboring junctions and the diffusion current in the stack. We observed that, if we increase the coupling and the dissipation para...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/9/7/327 |
| _version_ | 1798004936799158272 |
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| author | Marina Cuzminschi Alexei Zubarev |
| author_facet | Marina Cuzminschi Alexei Zubarev |
| author_sort | Marina Cuzminschi |
| collection | DOAJ |
| description | In this work, we effectuated the numerical simulations of the phase dynamics of an array of Josephson junctions taking into account the capacitive coupling between the neighboring junctions and the diffusion current in the stack. We observed that, if we increase the coupling and the dissipation parameters, the IV characteristic changes qualitatively from the IV characteristics studied before. For currents greater than the critical one, we obtained an additional branch in the IV characteristics. This branch is characterized by a lower voltage than the outermost one. Moreover, we obtained an additional charging of the superconducting layers in the IV region for currents greater than the critical one. We studied the time evolution of this charging by the means of Fast Fourier Transform. We proved that the charge density wave associated with this charging has a complex spectral structure. In addition, we analyzed the behavior of the system for different boundary conditions, appropriate to different experimental setups. |
| first_indexed | 2024-04-11T12:31:24Z |
| format | Article |
| id | doaj.art-8fd0a309c27e4cb282ce6672a4543540 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-11T12:31:24Z |
| publishDate | 2019-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-8fd0a309c27e4cb282ce6672a45435402022-12-22T04:23:44ZengMDPI AGCrystals2073-43522019-06-019732710.3390/cryst9070327cryst9070327Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical CurrentsMarina Cuzminschi0Alexei Zubarev1National Institute for Physics and Nuclear Engineering, Department of Theoretical Physics, P.O. Box MG-6, RO-077125 Bucharest-Magurele, RomaniaFaculty of Physics, University of Bucharest, Magurele, 077125 Ilfov, RomaniaIn this work, we effectuated the numerical simulations of the phase dynamics of an array of Josephson junctions taking into account the capacitive coupling between the neighboring junctions and the diffusion current in the stack. We observed that, if we increase the coupling and the dissipation parameters, the IV characteristic changes qualitatively from the IV characteristics studied before. For currents greater than the critical one, we obtained an additional branch in the IV characteristics. This branch is characterized by a lower voltage than the outermost one. Moreover, we obtained an additional charging of the superconducting layers in the IV region for currents greater than the critical one. We studied the time evolution of this charging by the means of Fast Fourier Transform. We proved that the charge density wave associated with this charging has a complex spectral structure. In addition, we analyzed the behavior of the system for different boundary conditions, appropriate to different experimental setups.https://www.mdpi.com/2073-4352/9/7/327Josephson junctionsovercritical currentstravelling waveshysteresisbranching |
| spellingShingle | Marina Cuzminschi Alexei Zubarev Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents Crystals Josephson junctions overcritical currents travelling waves hysteresis branching |
| title | Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents |
| title_full | Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents |
| title_fullStr | Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents |
| title_full_unstemmed | Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents |
| title_short | Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents |
| title_sort | charging of superconducting layers in arrays of coupled josephson junctions for overcritical currents |
| topic | Josephson junctions overcritical currents travelling waves hysteresis branching |
| url | https://www.mdpi.com/2073-4352/9/7/327 |
| work_keys_str_mv | AT marinacuzminschi chargingofsuperconductinglayersinarraysofcoupledjosephsonjunctionsforovercriticalcurrents AT alexeizubarev chargingofsuperconductinglayersinarraysofcoupledjosephsonjunctionsforovercriticalcurrents |