Magnetic quantum oscillations in borocarbide superconductors
We report systematic de Haas–van Alphen (dHvA) investigations in the normal and superconducting state of RNi₂B₂C (R = Y and Lu). The observed rich frequency spectrum of the dHvA signals results from a rather complex electronic band structure with different open and closed Fermi-surface sheets. Fro...
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| Дата: | 2009 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2009
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| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/117357 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Magnetic quantum oscillations in borocarbide superconductors / B. Bergk, J. Wosnitza // Физика низких температур. — 2009. — Т. 35, № 8-9. — С. 872-878. — Бібліогр.: 45 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
irk-123456789-117357 |
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dspace |
| spelling |
irk-123456789-1173572017-05-23T03:03:26Z Magnetic quantum oscillations in borocarbide superconductors Bergk, B. Wosnitza, J. Электронные свойства проводящих систем We report systematic de Haas–van Alphen (dHvA) investigations in the normal and superconducting state of RNi₂B₂C (R = Y and Lu). The observed rich frequency spectrum of the dHvA signals results from a rather complex electronic band structure with different open and closed Fermi-surface sheets. From our data in combination with full-potential local-orbital calculations we are able to extract the angular-resolved mass-enhancement factors, λ, for different bands. We find a strong anisotropy and band dependence of λ, clearly reflecting the multiband character of the superconductivity in RNi₂B₂C. We further were able to resolve dHvA oscillations deep into the superconducting state. The observed additional damping of the dHvA amplitudes is much less than expected from most theories. This hints at a reduced or even zero superconducting gap for the detected Fermi surface. 2009 Article Magnetic quantum oscillations in borocarbide superconductors / B. Bergk, J. Wosnitza // Физика низких температур. — 2009. — Т. 35, № 8-9. — С. 872-878. — Бібліогр.: 45 назв. — англ. 0132-6414 PACS: 74.70.Dd, 71.18.+y, 74.25.Jb http://dspace.nbuv.gov.ua/handle/123456789/117357 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 |
Электронные свойства проводящих систем Электронные свойства проводящих систем |
| spellingShingle |
Электронные свойства проводящих систем Электронные свойства проводящих систем Bergk, B. Wosnitza, J. Magnetic quantum oscillations in borocarbide superconductors Физика низких температур |
| description |
We report systematic de Haas–van Alphen (dHvA) investigations in the normal and superconducting
state of RNi₂B₂C (R = Y and Lu). The observed rich frequency spectrum of the dHvA signals results from a
rather complex electronic band structure with different open and closed Fermi-surface sheets. From our data
in combination with full-potential local-orbital calculations we are able to extract the angular-resolved
mass-enhancement factors, λ, for different bands. We find a strong anisotropy and band dependence of λ,
clearly reflecting the multiband character of the superconductivity in RNi₂B₂C. We further were able to
resolve dHvA oscillations deep into the superconducting state. The observed additional damping of the
dHvA amplitudes is much less than expected from most theories. This hints at a reduced or even zero superconducting
gap for the detected Fermi surface. |
| format |
Article |
| author |
Bergk, B. Wosnitza, J. |
| author_facet |
Bergk, B. Wosnitza, J. |
| author_sort |
Bergk, B. |
| title |
Magnetic quantum oscillations in borocarbide superconductors |
| title_short |
Magnetic quantum oscillations in borocarbide superconductors |
| title_full |
Magnetic quantum oscillations in borocarbide superconductors |
| title_fullStr |
Magnetic quantum oscillations in borocarbide superconductors |
| title_full_unstemmed |
Magnetic quantum oscillations in borocarbide superconductors |
| title_sort |
magnetic quantum oscillations in borocarbide superconductors |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2009 |
| topic_facet |
Электронные свойства проводящих систем |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/117357 |
| citation_txt |
Magnetic quantum oscillations in borocarbide superconductors / B. Bergk, J. Wosnitza // Физика низких температур. — 2009. — Т. 35, № 8-9. — С. 872-878. — Бібліогр.: 45 назв. — англ. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT bergkb magneticquantumoscillationsinborocarbidesuperconductors AT wosnitzaj magneticquantumoscillationsinborocarbidesuperconductors |
| first_indexed |
2023-10-18T20:29:38Z |
| last_indexed |
2023-10-18T20:29:38Z |
| _version_ |
1796150344858730496 |