Superconducting gap and pair breaking in CeRu₂ studied by point contacts
The superconducting gap in a CeRu₂ single crystal is investigated by point contacts. BCS-like behavior of the gap Δ in the temperature range below Tc* (Tc*<Tc, where Tc is the critical temperature) is established, indicating the presence of a gapless superconductivity region (between Tc* and Tc)....
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| Дата: | 2001 |
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| Автори: | , , , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2001
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| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/128807 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Superconducting gap and pair breaking in CeRu₂ studied by point contacts / A.V. Moskalenko, Yu. G. Naidyuk, I.K. Yanson, M.Hedo, Y.Inada, Y.Ōnuki, Y.Haga E. Yamamoto // Физика низких температур. — 2001. — Т. 27, № 8. — С. 831-834. — Бібліогр.: 9 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1288072020-10-31T18:01:36Z Superconducting gap and pair breaking in CeRu₂ studied by point contacts Moskalenko, A.V. Naidyuk, Yu.G. Yanson, I.K. Ōnuki, Y. Haga, Y. Yamamoto, E. Hedo, M. Inada, Y. Свеpхпpоводимость, в том числе высокотемпеpатуpная The superconducting gap in a CeRu₂ single crystal is investigated by point contacts. BCS-like behavior of the gap Δ in the temperature range below Tc* (Tc*<Tc, where Tc is the critical temperature) is established, indicating the presence of a gapless superconductivity region (between Tc* and Tc). The pair-breaking effect of paramagnetic impurities, supposedly Ce ions, is taken into consideration using the Scalski–Betbeder–Matibet–Weiss approach based on Abrikosov–Gorkov theory. It allows us to recalculate the superconducting order parameter Δα (in the presence of paramagnetic impurities) and the gap Δp (in the pure case) for the single crystal and for the previously studied polycrystalline CeRu₂. The value 2Δp(0)≈2 meV, with 2Δp(0)/kBTc≈3.75, is found in both cases, indicating that CeRu₂ is a “moderate” strong-coupling superconductor. 2001 Article Superconducting gap and pair breaking in CeRu₂ studied by point contacts / A.V. Moskalenko, Yu. G. Naidyuk, I.K. Yanson, M.Hedo, Y.Inada, Y.Ōnuki, Y.Haga E. Yamamoto // Физика низких температур. — 2001. — Т. 27, № 8. — С. 831-834. — Бібліогр.: 9 назв. — англ. 0132-6414 PACS: 74.80.Fp, 74.70.Tx, 73.40.Jn http://dspace.nbuv.gov.ua/handle/123456789/128807 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 |
Свеpхпpоводимость, в том числе высокотемпеpатуpная Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| spellingShingle |
Свеpхпpоводимость, в том числе высокотемпеpатуpная Свеpхпpоводимость, в том числе высокотемпеpатуpная Moskalenko, A.V. Naidyuk, Yu.G. Yanson, I.K. Ōnuki, Y. Haga, Y. Yamamoto, E. Hedo, M. Inada, Y. Superconducting gap and pair breaking in CeRu₂ studied by point contacts Физика низких температур |
| description |
The superconducting gap in a CeRu₂ single crystal is investigated by point contacts. BCS-like behavior of the gap Δ in the temperature range below Tc* (Tc*<Tc, where Tc is the critical temperature) is established, indicating the presence of a gapless superconductivity region (between Tc* and Tc). The pair-breaking effect of paramagnetic impurities, supposedly Ce ions, is taken into consideration using the Scalski–Betbeder–Matibet–Weiss approach based on Abrikosov–Gorkov theory. It allows us to recalculate the superconducting order parameter Δα (in the presence of paramagnetic impurities) and the gap Δp (in the pure case) for the single crystal and for the previously studied polycrystalline CeRu₂. The value 2Δp(0)≈2 meV, with 2Δp(0)/kBTc≈3.75, is found in both cases, indicating that CeRu₂ is a “moderate” strong-coupling superconductor. |
| format |
Article |
| author |
Moskalenko, A.V. Naidyuk, Yu.G. Yanson, I.K. Ōnuki, Y. Haga, Y. Yamamoto, E. Hedo, M. Inada, Y. |
| author_facet |
Moskalenko, A.V. Naidyuk, Yu.G. Yanson, I.K. Ōnuki, Y. Haga, Y. Yamamoto, E. Hedo, M. Inada, Y. |
| author_sort |
Moskalenko, A.V. |
| title |
Superconducting gap and pair breaking in CeRu₂ studied by point contacts |
| title_short |
Superconducting gap and pair breaking in CeRu₂ studied by point contacts |
| title_full |
Superconducting gap and pair breaking in CeRu₂ studied by point contacts |
| title_fullStr |
Superconducting gap and pair breaking in CeRu₂ studied by point contacts |
| title_full_unstemmed |
Superconducting gap and pair breaking in CeRu₂ studied by point contacts |
| title_sort |
superconducting gap and pair breaking in ceru₂ studied by point contacts |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2001 |
| topic_facet |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/128807 |
| citation_txt |
Superconducting gap and pair breaking in CeRu₂ studied by point contacts / A.V. Moskalenko, Yu. G. Naidyuk, I.K. Yanson, M.Hedo, Y.Inada, Y.Ōnuki, Y.Haga E. Yamamoto // Физика низких температур. — 2001. — Т. 27, № 8. — С. 831-834. — Бібліогр.: 9 назв. — англ. |
| series |
Физика низких температур |
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2023-10-18T20:56:10Z |
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