Point contact studies of the superconducting gap of CeRu2

Naidyuk, Y. G., Moskalenko, Andriy V., Yanson, I. K. and Geibel, C. 1998. Point contact studies of the superconducting gap of CeRu2. Low Temperature Physics 24 (5) , pp. 374-376. 10.1063/1.593604

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Abstract

The measured dV/dI(V) curves of point contacts between the intermetallic compound CeRu2 in the superconducting state and the normal metal Cu correspond fairly well to the Blonder–Tinkham–Klapwijk model. It is used to obtain temperature and magnetic field dependence of the superconducting gap Δ. The Δ(T) dependence corresponds well to the BCS theory with 2Δ(0)/kBTc∗ = 3.1±0.1. Additionally, a region of gapless superconductivity between Tc∗ ≃ 4.4−5.4 K and Tcbulk ≃ 6.2 K is found. The gap decreases approximately linearly in a magnetic field and vanishes in a field Bc∗ ≃ 3.5 T, which is well below the upper critical field Bc2 ≃ 6 T and close to the irreversibility field.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Institute of Physics
ISSN:	1063-777X
Last Modified:	23 Mar 2017 04:01
URI:	https://orca.cardiff.ac.uk/id/eprint/46007

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