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We report on specific heat and magnetotransport measurements performed on superconducting Cu 10% TiSe 2 single crystals. We show that superconductivity persists in transport measurements up to magnetic fields H R well above the upper critical field H c2 deduced from the calorimetric measurements. Su...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2016-04, Vol.523, p.19-22
Main Authors: Levy-Bertrand, F., Michon, B., Marcus, J., Marcenat, C., Kačmarčík, J., Klein, T., Cercellier, H.
Format: Article
Language:English
Subjects:
Condensed Matter
Physics
Superconductivity
Online Access:Get full text
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Summary:We report on specific heat and magnetotransport measurements performed on superconducting Cu 10% TiSe 2 single crystals. We show that superconductivity persists in transport measurements up to magnetic fields H R well above the upper critical field H c2 deduced from the calorimetric measurements. Surprisingly this " surface " superconductivity is present for all magnetic field orientations, either parallel or perpendicular to the layers. For Hab, the temperature dependence of the H R /H c2 ratio can be well reproduced by solving the Ginzburg-Landau equations in presence of a surface layer with reduced superconducting properties. Unexpectedly this temperature dependence does not depend on the field orientation.
ISSN:0921-4534
DOI:10.1016/j.physc.2016.02.004