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-sur...
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| Published in: | Физика низких температур |
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| Date: | 2009 |
| Main Authors: | , |
| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2009
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/117357 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | 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. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862588610926084096 |
|---|---|
| author | Bergk, B. Wosnitza, J. |
| author_facet | Bergk, B. Wosnitza, J. |
| 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. |
| collection | DSpace DC |
| container_title | 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.
|
| first_indexed | 2025-11-27T01:28:26Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-117357 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-27T01:28:26Z |
| publishDate | 2009 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Bergk, B. Wosnitza, J. 2017-05-22T15:25:44Z 2017-05-22T15:25:44Z 2009 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 https://nasplib.isofts.kiev.ua/handle/123456789/117357 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. We acknowledge P.C. Canfield and G. Behr for supplying
 the high-quality samples, H. Rosner, V. Petzold, and
 S.-L. Drechsler for their theoretical input, A. D. Bianchi, M.
 Bartkowiak, O. Ignatchik, I. Sheikin, and J. Perenboom for
 experimental support. We thank all of them for helpful discussions.
 The work was supported by the DFG through SFB
 463. Part of this work has been supported by EuroMagNET
 under the EU contract RII3-CT-2004-506239 of FP6. The
 work at GHMFL was supported by the EC program Transnational
 Access — Specific Support Action (Contract No.
 RITA-CT-2003-505474) .Work at the Ames Laboratory was
 supported by the Department of Energy, Basic Energy Sciences
 under Contract No. DE-AC02-07CH11358. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Электронные свойства проводящих систем Magnetic quantum oscillations in borocarbide superconductors Article published earlier |
| spellingShingle | Magnetic quantum oscillations in borocarbide superconductors Bergk, B. Wosnitza, J. Электронные свойства проводящих систем |
| title | 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_short | Magnetic quantum oscillations in borocarbide superconductors |
| title_sort | magnetic quantum oscillations in borocarbide superconductors |
| topic | Электронные свойства проводящих систем |
| topic_facet | Электронные свойства проводящих систем |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/117357 |
| work_keys_str_mv | AT bergkb magneticquantumoscillationsinborocarbidesuperconductors AT wosnitzaj magneticquantumoscillationsinborocarbidesuperconductors |