Thermodynamic and transport investigation of CeCo In5-x Snx

E. D. Bauer, F. Ronning, C. Capan, M. J. Graf, D. Vandervelde, H. Q. Yuan, M. B. Salamon, D. J. Mixson, N. O. Moreno, S. R. Brown, J. D. Thompson, R. Movshovich, M. F. Hundley, J. L. Sarrao, P. G. Pagliuso, S. M. Kauzlarich

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41 Scopus citations

Abstract

Measurements of specific heat, magnetic susceptibility, electrical resistivity, and penetration depth have been performed on CeCo In5-x Snx (0≤x≤0.24) single crystals. The suppression of superconductivity and the decrease of the specific heat jump at Tc, ΔC Tc, with increasing Sn concentration, and the power-law temperature dependence of penetration depth are consistent with impurity scattering calculated within the Abrikosov-Gorkov formalism indicating d -wave superconductivity in CeCo In5-x Snx. The non-Fermi liquid behavior [C T∼-ln T and ρ (T) ∼T] observed in the normal state in zero magnetic field is quite robust against Sn substitution (and a variety of other tuning parameters), suggesting quantum criticality involving itinerant f -electrons in this system.

Original languageEnglish (US)
Article number245109
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number24
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Condensed Matter Physics

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