Tunneling spectra of break junctions involving Nb₃Sn
The electronic gap structure of Nb3Sn was measured by the break-junction (BJ) tunneling technique. The superconducting gap values are estimated to be in the range 2∆ = 4–5.5 meV at T = 4.2 K as follows from the observed distinct conductance peaks. In addition to the superconducting gap structure,...
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| Datum: | 2014 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2014
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| Schriftenreihe: | Физика низких температур |
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| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/119668 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Tunneling spectra of break junctions involving Nb₃Sn / Toshikazu Ekino, Akira Sugimoto, Yuta Sakai, A.M. Gabovich, Jun Akimitsu // Физика низких температур. — 2014. — Т. 40, № 10. — С. 1182-1186. — Бібліогр.: 24 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | The electronic gap structure of Nb3Sn was measured by the break-junction (BJ) tunneling technique. The superconducting
gap values are estimated to be in the range 2∆ = 4–5.5 meV at T = 4.2 K as follows from the observed
distinct conductance peaks. In addition to the superconducting gap structure, we observed reproducible
hump-like structures at the biases of about ± 20 and ± 50 mV. Such a coexistence of gap and hump structures resembles
the situation found in the high-Tc copper-oxide superconductors. Above the superconducting critical
temperature Tc ~ 18 K, the humps appear as the only gap-like structures. Their possible origin is discussed in
connection to the structural phase transition occurring in Nb₃Sn. |
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