Point-contact spectroscopy of the antiferromagnetic superconductor HoNi2B2C

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dc.creatorNaidyuk, Yu. G.
dc.creatorKvitnitskaya, O. E.
dc.creatorYanson, I. K.
dc.creatorFuchs, G.
dc.creatorNenkov, K.
dc.creatorWalte, A.
dc.creatorBehr, G.
dc.creatorSouptel, D.
dc.creatorDrechsler, S. -L.
dc.date2006-09-29
dc.date.accessioned2026-07-07T08:26:28Z
dc.date.available2026-07-07T08:26:28Z
dc.descriptionThe point-contact (PC) spectroscopy study of the electron-phonon(boson) interaction (EP(B)I) spectral function in HoNi2B2C reveals phonon maxima at 16 and 22meV and 34meV. For the first time the pronounced high energy maxima at about 50meV and 100meV were resolved. Additionally, an admixture of a crystalline-electric-field (CEF) excitation with a maximum near 10meV and a `magnetic` peak near 3meV are observed. The contribution of the CEF peak in EP(B)I constant λ_{PC} is evaluated as 20-30%, while contribution of the high frequency modes at 50 and 100meV amounts about 10% for each maxima. PC Andreev reflection measurements below the critical temperature T_c=8.5K reveals two different superconducting (SC) states separated by T_c^*=5.6K which is close to the Neel temperature T_N=5.3K. Below T_c^* the gap Δin HoNi2B2C exhibits a standard single-band BCS-like behavior with 2Δ/kT_c^*=3.9. Above T_c^* the gap features in PC spectra are strongly suppressed pointing to a peculiar SC state between T_c^* and T_c, where incommensurate magnetic order develops.
dc.description3 figs, 2 pages, presented on M2S-HTSC Conference, July 9-14, 2006, Dresden
dc.identifierhttps://arxiv.org/abs/cond-mat/0609770
dc.identifierhttp://arxiv.org/abs/cond-mat/0609770
dc.identifierPhysica C 460-462 (2007) 105-06.
dc.identifierdoi:10.1016/j.physc.2007.03.165
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/136949
dc.subjectSuperconductivity
dc.titlePoint-contact spectroscopy of the antiferromagnetic superconductor HoNi2B2C
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