Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach
We use variational approach to analyze the evolution of the dynamics of a neutral s-wave superconductor between BCS and BEC regimes. We consider 2D case, when BCS–BEC crossover occurs already at weak coupling and is governed by the ratio of the two scales — the Fermi energy EF and the bound state en...
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| Дата: | 2018 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2018
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| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/176148 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach / A.V. Chubukov, D. Mozyrsky // Физика низких температур. — 2018. — Т. 44, № 6. — С. 684-690. — Бібліогр.: 42 назв. — англ. |
Репозитарії
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irk-123456789-1761482021-02-04T01:30:18Z Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach Chubukov, A.V. Mozyrsky, D. Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова We use variational approach to analyze the evolution of the dynamics of a neutral s-wave superconductor between BCS and BEC regimes. We consider 2D case, when BCS–BEC crossover occurs already at weak coupling and is governed by the ratio of the two scales — the Fermi energy EF and the bound state energy for two fermions in a vacuum, E₀. BCS and BEC regimes correspond to EF >> E₀ and EF << E₀, respectively. We compute the spectrum of low-energy bosonic excitations and show that the velocity of phase fluctuations remains υF / √2 through BCS–BEC crossover. We also discuss the topological Aφ ̇ term in the effective action. 2018 Article Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach / A.V. Chubukov, D. Mozyrsky // Физика низких температур. — 2018. — Т. 44, № 6. — С. 684-690. — Бібліогр.: 42 назв. — англ. 0132-6414 PACS: 74.20.Fg, 74.25.Вt, 74.78.–w http://dspace.nbuv.gov.ua/handle/123456789/176148 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 К 90-летию со дня рождения A.A. Абрикосова Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова |
| spellingShingle |
Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова Chubukov, A.V. Mozyrsky, D. Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach Физика низких температур |
| description |
We use variational approach to analyze the evolution of the dynamics of a neutral s-wave superconductor between BCS and BEC regimes. We consider 2D case, when BCS–BEC crossover occurs already at weak coupling and is governed by the ratio of the two scales — the Fermi energy EF and the bound state energy for two fermions in a vacuum, E₀. BCS and BEC regimes correspond to EF >> E₀ and EF << E₀, respectively. We compute the spectrum of low-energy bosonic excitations and show that the velocity of phase fluctuations remains υF / √2 through BCS–BEC crossover. We also discuss the topological Aφ ̇ term in the effective action. |
| format |
Article |
| author |
Chubukov, A.V. Mozyrsky, D. |
| author_facet |
Chubukov, A.V. Mozyrsky, D. |
| author_sort |
Chubukov, A.V. |
| title |
Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_short |
Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_full |
Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_fullStr |
Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_full_unstemmed |
Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_sort |
evolution of the dynamics of neutral superconductors between bcs and bec regimes: the variational approach |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2018 |
| topic_facet |
Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/176148 |
| citation_txt |
Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach / A.V. Chubukov, D. Mozyrsky // Физика низких температур. — 2018. — Т. 44, № 6. — С. 684-690. — Бібліогр.: 42 назв. — англ. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT chubukovav evolutionofthedynamicsofneutralsuperconductorsbetweenbcsandbecregimesthevariationalapproach AT mozyrskyd evolutionofthedynamicsofneutralsuperconductorsbetweenbcsandbecregimesthevariationalapproach |
| first_indexed |
2023-10-18T22:40:36Z |
| last_indexed |
2023-10-18T22:40:36Z |
| _version_ |
1796156141227474944 |