Superconducting gap and electron-phonon interaction in MgB$_2$ thin film studied by point contacts

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dc.creatorBobrov, N. L.
dc.creatorChubov, P. N.
dc.creatorNaidyuk, Yu. G.
dc.creatorTyutrina, L. V.
dc.creatorYanson, I. K.
dc.creatorKang, W. N.
dc.creatorKim, Hyeong-Jin
dc.creatorChoi, Eun-Mi
dc.creatorLee, Sung-Ik
dc.date2001-09-29
dc.date2001-11-20
dc.date.accessioned2026-07-07T02:42:52Z
dc.date.available2026-07-07T02:42:52Z
dc.descriptionThe superconducting order parameter and electron-phonon interaction (EPI) in a MgB$_{2}$ c-axis oriented thin film are investigated by point contacts (PCs). Two superconducting gaps $Δ_{Small}\approx 2.6$ meV and $Δ_{Large}\approx 7.4$ meV have been established, which fairly well correspond to the theoretical gap ratio 1:3. The reconstructed PC EPI function along c-axis has above 30 meV similarities with the phonon DOS, while a pronounced maximum around 20 meV is resolved pointing out that the low frequency phonon mode can be of importance for pairing. We have estimated the Fermi velocity in MgB$_2$ about 5$\times 10^7$ cm/s.
dc.descriptionV2. Refs. [17, 23, 24, 34, 40] are added, plain text improvements, 5 pages incl. 4 figures, RevTex4. Presented at the NATO ARW "New Trends in Superconductivity", Yalta, Ukraine, 16-20 Sept. 2001
dc.identifierhttps://arxiv.org/abs/cond-mat/0110006
dc.identifierhttp://arxiv.org/abs/cond-mat/0110006
dc.identifierin {\it New Trends in Superconductivity}, ed. by J. F. Annett and S. Kruchinin, (Kluwer Academic Publisher, 2002) NATO Science Series II: Mathematics, Physics and Chemistry, Vol.67, p.225-234.
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18318
dc.subjectSuperconductivity
dc.titleSuperconducting gap and electron-phonon interaction in MgB$_2$ thin film studied by point contacts
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