Influence of electron-electron interactions on supercurrent in SNS structures
We consider a superconductor-normal quantum dot-superconductor structure in which the number of electrons in the dot can be controlled by a gate voltage. We study the effect of electron-electron interactions on the supercurrent between the two superconductors. Using both an analytic model and numeri...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2003 |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2003
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Influence of electron-electron interactions on supercurrent in SNS structures / K. Engström, J. Kinaret, R.I. Shekhter, M. Puska H. Saarikoski // Физика низких температур. — 2003. — Т. 29, № 7. — С. 733-739. — Бібліогр.: 33 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862701898489921536 |
|---|---|
| author | Engström, K. Kinaret, J. Shekhter, R.I. Puska, H. Saarikoski, M. |
| author_facet | Engström, K. Kinaret, J. Shekhter, R.I. Puska, H. Saarikoski, M. |
| citation_txt | Influence of electron-electron interactions on supercurrent in SNS structures / K. Engström, J. Kinaret, R.I. Shekhter, M. Puska H. Saarikoski // Физика низких температур. — 2003. — Т. 29, № 7. — С. 733-739. — Бібліогр.: 33 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | We consider a superconductor-normal quantum dot-superconductor structure in which the number of electrons in the dot can be controlled by a gate voltage. We study the effect of electron-electron interactions on the supercurrent between the two superconductors. Using both an analytic model and numerical density functional calculations, we find that Coulomb interactions may serve to make the system quantum mechanically more "rigid", i.e., increasing its sensitivity to phase gradients, hence enhancing the supercurrent through the structure, especially at small phase differences. Accordingly, we find that in this structure the supercurrent can be controlled by the gate voltage.
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| first_indexed | 2025-12-07T16:43:05Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-128881 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T16:43:05Z |
| publishDate | 2003 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Engström, K. Kinaret, J. Shekhter, R.I. Puska, H. Saarikoski, M. 2018-01-14T11:32:25Z 2018-01-14T11:32:25Z 2003 Influence of electron-electron interactions on supercurrent in SNS structures / K. Engström, J. Kinaret, R.I. Shekhter, M. Puska H. Saarikoski // Физика низких температур. — 2003. — Т. 29, № 7. — С. 733-739. — Бібліогр.: 33 назв. — англ. 0132-6414 PACS: 74.80.Fp, 73.63.Kv, 85.25.Cp, 74.50.+r https://nasplib.isofts.kiev.ua/handle/123456789/128881 We consider a superconductor-normal quantum dot-superconductor structure in which the number of electrons in the dot can be controlled by a gate voltage. We study the effect of electron-electron interactions on the supercurrent between the two superconductors. Using both an analytic model and numerical density functional calculations, we find that Coulomb interactions may serve to make the system quantum mechanically more "rigid", i.e., increasing its sensitivity to phase gradients, hence enhancing the supercurrent through the structure, especially at small phase differences. Accordingly, we find that in this structure the supercurrent can be controlled by the gate voltage. The authors wish to acknowledge fruitful discussions with Leonid Gorelik, Jason Hogan-O’Neill, Göran Johansson, Axel Ruhe and Vitaly Shumeiko. Financial support was provided by the Swedish Foundation for Strategic Research (SSF) program «Quantum Devices and Nano-Science», by the Swedish Natural Science Research Council, and by the Academy of Finland through its Centre of Excellence Programme (2000–2005). en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Свеpхпpоводимость, в том числе высокотемпеpатуpная Influence of electron-electron interactions on supercurrent in SNS structures Article published earlier |
| spellingShingle | Influence of electron-electron interactions on supercurrent in SNS structures Engström, K. Kinaret, J. Shekhter, R.I. Puska, H. Saarikoski, M. Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| title | Influence of electron-electron interactions on supercurrent in SNS structures |
| title_full | Influence of electron-electron interactions on supercurrent in SNS structures |
| title_fullStr | Influence of electron-electron interactions on supercurrent in SNS structures |
| title_full_unstemmed | Influence of electron-electron interactions on supercurrent in SNS structures |
| title_short | Influence of electron-electron interactions on supercurrent in SNS structures |
| title_sort | influence of electron-electron interactions on supercurrent in sns structures |
| topic | Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| topic_facet | Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/128881 |
| work_keys_str_mv | AT engstromk influenceofelectronelectroninteractionsonsupercurrentinsnsstructures AT kinaretj influenceofelectronelectroninteractionsonsupercurrentinsnsstructures AT shekhterri influenceofelectronelectroninteractionsonsupercurrentinsnsstructures AT puskah influenceofelectronelectroninteractionsonsupercurrentinsnsstructures AT saarikoskim influenceofelectronelectroninteractionsonsupercurrentinsnsstructures |