The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples
A theory has been developed to explain the anomalous behavior of the magnetic susceptibility of a normal metal-superconductor (NS) structure in weak magnetic fields at millikelvin temperatures. The effect was discovered experimentally (A.C. Mota et al., Phys. Rev. Lett. 65, 1514 (1990)). In cylin...
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| Дата: | 2006 |
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| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2006
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| Назва видання: | Физика низких температур |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120211 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples / G.A. Gogadze // Физика низких температур. — 2006. — Т. 32, № 6. — С. 716–728. — Бібліогр.: 29 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1202112017-06-12T03:05:09Z The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples Gogadze, G.A. Специальный выпуск superconductivity: XX years after the discovery A theory has been developed to explain the anomalous behavior of the magnetic susceptibility of a normal metal-superconductor (NS) structure in weak magnetic fields at millikelvin temperatures. The effect was discovered experimentally (A.C. Mota et al., Phys. Rev. Lett. 65, 1514 (1990)). In cylindrical superconducting samples covered with a thin normal pure metal layer, the susceptibility exhibited a reentrant effect: it started to increase unexpectedly when the temperature lowered below 100 mK. The effect was observed in mesoscopic NS structures when the N and S metals were in good electric contact. The theory proposed is essentially based on the properties of the Andreev levels in the normal metal. When the magnetic field (or temperature) changes, each of the Andreev levels coincides from time to time with the chemical potential of the metal. As a result, the state of the NS structure experiences strong degeneracy, and the quasiparticle density of states exhibits resonance spikes. This generates a large paramagnetic contribution to the susceptibility, which adds up to the diamagnetic contribution thus leading to the reentrant effect. The explanation proposed was obtained within the model of free electrons. The theory provides a good description for experimental results. 2006 Article The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples / G.A. Gogadze // Физика низких температур. — 2006. — Т. 32, № 6. — С. 716–728. — Бібліогр.: 29 назв. — англ. 0132-6414 PACS: 74.50.+r, 74.45.+c http://dspace.nbuv.gov.ua/handle/123456789/120211 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Специальный выпуск superconductivity: XX years after the discovery Специальный выпуск superconductivity: XX years after the discovery |
| spellingShingle |
Специальный выпуск superconductivity: XX years after the discovery Специальный выпуск superconductivity: XX years after the discovery Gogadze, G.A. The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples Физика низких температур |
| description |
A theory has been developed to explain the anomalous behavior of the magnetic susceptibility
of a normal metal-superconductor (NS) structure in weak magnetic fields at millikelvin temperatures.
The effect was discovered experimentally (A.C. Mota et al., Phys. Rev. Lett. 65, 1514
(1990)). In cylindrical superconducting samples covered with a thin normal pure metal layer, the
susceptibility exhibited a reentrant effect: it started to increase unexpectedly when the temperature
lowered below 100 mK. The effect was observed in mesoscopic NS structures when the N and S
metals were in good electric contact. The theory proposed is essentially based on the properties of
the Andreev levels in the normal metal. When the magnetic field (or temperature) changes, each
of the Andreev levels coincides from time to time with the chemical potential of the metal. As a result,
the state of the NS structure experiences strong degeneracy, and the quasiparticle density of
states exhibits resonance spikes. This generates a large paramagnetic contribution to the susceptibility,
which adds up to the diamagnetic contribution thus leading to the reentrant effect. The explanation
proposed was obtained within the model of free electrons. The theory provides a good
description for experimental results. |
| format |
Article |
| author |
Gogadze, G.A. |
| author_facet |
Gogadze, G.A. |
| author_sort |
Gogadze, G.A. |
| title |
The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples |
| title_short |
The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples |
| title_full |
The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples |
| title_fullStr |
The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples |
| title_full_unstemmed |
The theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples |
| title_sort |
theory of the reentrant effect in susceptibility of cylindrical mesoscopic samples |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2006 |
| topic_facet |
Специальный выпуск superconductivity: XX years after the discovery |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/120211 |
| citation_txt |
The theory of the reentrant effect in susceptibility
of cylindrical mesoscopic samples / G.A. Gogadze // Физика низких температур. — 2006. — Т. 32, № 6. — С. 716–728. — Бібліогр.: 29 назв. — англ. |
| series |
Физика низких температур |
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AT gogadzega thetheoryofthereentranteffectinsusceptibilityofcylindricalmesoscopicsamples AT gogadzega theoryofthereentranteffectinsusceptibilityofcylindricalmesoscopicsamples |
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2023-10-18T20:36:32Z |
| last_indexed |
2023-10-18T20:36:32Z |
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1796150647942283264 |