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Phys. Rev. B 73, 245109 (2006) [9 pages]

Thermodynamic and transport investigation of CeCoIn5−xSnx

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E. D. Bauer1, F. Ronning1, C. Capan1,*, M. J. Graf1, D. Vandervelde2, H. Q. Yuan2, M. B. Salamon2, D. J. Mixson3, N. O. Moreno1,†, S. R. Brown4, J. D. Thompson1, R. Movshovich1, M. F. Hundley1, J. L. Sarrao1, P. G. Pagliuso5, and S. M. Kauzlarich4
1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
2Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
3Department of Physics, University of Florida, Gainesville, Florida 32611, USA
4Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA
5Cidade Universitaria, BR-13083-970 Campinas-SP, Brazil

See Also: Erratum

Received 8 March 2006; published 16 June 2006

Measurements of specific heat, magnetic susceptibility, electrical resistivity, and penetration depth have been performed on CeCoIn5−xSnx (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 CeCoIn5−xSnx. 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.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.73.245109
DOI:
10.1103/PhysRevB.73.245109
PACS:
71.27.+a, 72.15.Qm

*Present address: Department of Physics, and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70802 USA

†Present address: Department of Physics, Federal University of Sergipe, Sao Cristovao, SE 49100-000, Brazil

See Also

Erratum: 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, and S. M. Kauzlarich, Erratum: Thermodynamic and transport investigation of CeCoIn5−xSnx [Phys. Rev. B 73, 245109 (2006)], Phys. Rev. B 74, 129904 (2006).

 
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