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...
Збережено в:
| Дата: | 2009 |
|---|---|
| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2009
|
| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/117357 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| 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| Резюме: | 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. |
|---|