The Superconducting Gap Behavior in the Antiferromagnetic Nickel-Borocarbide Compounds RNi2B2C (R=Dy, Ho, Er, Tm) Studied by Point-Contacts Spectroscopy

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dc.creatorNaidyuk, Yu. G.
dc.creatorBehr, G.
dc.creatorBobrov, N. L.
dc.creatorChernobay, V. N.
dc.creatorDrechsler, S. -L.
dc.creatorFuchs, G.
dc.creatorKvitnitskaya, O. E.
dc.creatorNaugle, D. G.
dc.creatorRathnayaka, K. D. D.
dc.creatorYanson, I. K.
dc.date2008-06-30
dc.date2008-07-02
dc.date.accessioned2026-07-07T12:58:46Z
dc.date.available2026-07-07T12:58:46Z
dc.descriptionAn general survey of the superconducting (SC) gap study in the title compounds by point-contact (PC) spectroscopy is presented. The SC gap was determined from dV/dI of PCs employing the well-known theory of conductivity for normal metal-superconductor PCs accounting Andreev reflection. The theory was modified by including pair-breaking effects considering the presence of magnetic rare-earth ions. A possible multiband structure of these compounds was also taken into account. The PC study of the gap in the Er-compound (TN=6K<Tc=11K) gives =evidence for the presence of two SC gaps. Additionally, a distinct decrease of both gaps is revealed for R = Er in the antiferromagnetic (AF) state. For R = Tm (TN=1.5K<Tc=10.5K) a decrease of the SC gap is observed below 4-5K, while for R = Dy (TN=10.5K>Tc=6.5K) the SC gap has a BCS-like dependence in the AF state. The SC gap for R = Ho (TN=5.2K<Tc=8.5K) exhibits below T*=5.6K a single-band BCS-like dependence vanishing above T*, where a specific magnetic order occurs. The difference in the SC gap behavior in the title compounds is attributed to different AF ordering.
dc.description4 pages, 4 figs., submitted to LT25; V2. missed author is added
dc.identifierhttps://arxiv.org/abs/0806.4814
dc.identifierhttp://arxiv.org/abs/0806.4814
dc.identifierJournal of Physics: Conference Series 150 (2009) 052178
dc.identifierdoi:10.1088/1742-6596/150/5/052178
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/225356
dc.subjectSuperconductivity
dc.titleThe Superconducting Gap Behavior in the Antiferromagnetic Nickel-Borocarbide Compounds RNi2B2C (R=Dy, Ho, Er, Tm) Studied by Point-Contacts Spectroscopy
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