Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article)
We briefly review aspects of superconductive persistent currents in Josephson junctions of the
 S/I/S, S/O/S and S/N/S types, focusing on the origin of jumps in the current versus phase
 dependences, and discuss in more detail the persistent as well as «spontaneous» currents in the&a...
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| Дата: | 2004 |
|---|---|
| Автор: | |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2004
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/119787 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) / I.O. Kulik // Физика низких температур. — 2004. — Т. 30, № 7-8. — С. 705-713. — Бібліогр.: 79 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862725836957810688 |
|---|---|
| author | Kulik, I.O. |
| author_facet | Kulik, I.O. |
| citation_txt | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) / I.O. Kulik // Физика низких температур. — 2004. — Т. 30, № 7-8. — С. 705-713. — Бібліогр.: 79 назв. — англ. |
| collection | DSpace DC |
| description | We briefly review aspects of superconductive persistent currents in Josephson junctions of the
S/I/S, S/O/S and S/N/S types, focusing on the origin of jumps in the current versus phase
dependences, and discuss in more detail the persistent as well as «spontaneous» currents in the
Aharonov–Bohm mesoscopic and nanoscopic (macromolecular) structures. A fixed-number-of-electrons
mesoscopic or macromolecular conducting ring is shown to be unstable against structural
transformation removing spatial symmetry (in particular, azimuthal periodicity) of its electron-
lattice Hamiltonian. In case when the transformation is blocked by strong coupling to an external
azimuthally symmetric environment, the system becomes bistable in its electronic configuration
at certain number of electrons. At such a condition, the persistent current has a nonzero value
even at the (almost) zero applied Aharonov–Bohm flux, and results in very high magnetic susceptibility
dM/dH at small nonzero fields, followed by an oscillatory dependence at larger fields.
We tentatively assume that previously observed oscillatory magnetization in cyclic metallo-organic
molecules by Gatteschi et al. can be attributed to persistent currents. If this proves correct,
it may open an opportunity (and, more generally, macromolecular cyclic structures may suggest
the possibility) of engineering quantum computational tools based on the Aharonov–Bohm effect
in ballistic nanostructures and macromolecular cyclic aggregates.
|
| first_indexed | 2025-12-07T18:54:43Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-119787 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T18:54:43Z |
| publishDate | 2004 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Kulik, I.O. 2017-06-09T14:07:47Z 2017-06-09T14:07:47Z 2004 Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) / I.O. Kulik // Физика низких температур. — 2004. — Т. 30, № 7-8. — С. 705-713. — Бібліогр.: 79 назв. — англ. 0132-6414 PACS: 73.23.–b, 74.50.+r https://nasplib.isofts.kiev.ua/handle/123456789/119787 We briefly review aspects of superconductive persistent currents in Josephson junctions of the
 S/I/S, S/O/S and S/N/S types, focusing on the origin of jumps in the current versus phase
 dependences, and discuss in more detail the persistent as well as «spontaneous» currents in the
 Aharonov–Bohm mesoscopic and nanoscopic (macromolecular) structures. A fixed-number-of-electrons
 mesoscopic or macromolecular conducting ring is shown to be unstable against structural
 transformation removing spatial symmetry (in particular, azimuthal periodicity) of its electron-
 lattice Hamiltonian. In case when the transformation is blocked by strong coupling to an external
 azimuthally symmetric environment, the system becomes bistable in its electronic configuration
 at certain number of electrons. At such a condition, the persistent current has a nonzero value
 even at the (almost) zero applied Aharonov–Bohm flux, and results in very high magnetic susceptibility
 dM/dH at small nonzero fields, followed by an oscillatory dependence at larger fields.
 We tentatively assume that previously observed oscillatory magnetization in cyclic metallo-organic
 molecules by Gatteschi et al. can be attributed to persistent currents. If this proves correct,
 it may open an opportunity (and, more generally, macromolecular cyclic structures may suggest
 the possibility) of engineering quantum computational tools based on the Aharonov–Bohm effect
 in ballistic nanostructures and macromolecular cyclic aggregates. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Сверхпроводимость и мезоскопические структуры Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) Article published earlier |
| spellingShingle | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) Kulik, I.O. Сверхпроводимость и мезоскопические структуры |
| title | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) |
| title_full | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) |
| title_fullStr | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) |
| title_full_unstemmed | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) |
| title_short | Spontaneous and persistent currents in superconductive and mesoscopic structures (Review Article) |
| title_sort | spontaneous and persistent currents in superconductive and mesoscopic structures (review article) |
| topic | Сверхпроводимость и мезоскопические структуры |
| topic_facet | Сверхпроводимость и мезоскопические структуры |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/119787 |
| work_keys_str_mv | AT kulikio spontaneousandpersistentcurrentsinsuperconductiveandmesoscopicstructuresreviewarticle |