Field-induced quantum critical point in CeCoIn_5

Johnpierre Paglione; M. A. Tanatar; D. G. Hawthorn; Etienne Boaknin; R. W. Hill; F. Ronning; M. Sutherland; Louis Taillefer; C. Petrovic; P. C. Canfield

doi:10.1016/j.physc.2004.03.120

arXiv · cond-mat/0304497

Field-induced quantum critical point in CeCoIn_5

Johnpierre Paglione·M. A. Tanatar·D. G. Hawthorn·Etienne Boaknin·R. W. Hill·F. Ronning·M. Sutherland·Louis Taillefer·C. Petrovic·P. C. Canfield

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Abstract

The resistivity of CeCoIn_5 was measured down to 20 mK in magnetic fields of up to 16 T. With increasing field, we observe a suppression of the non-Fermi liquid behavior, rho~T, and the development of a Fermi liquid state, with its characteristic rho=rho_0+AT^2 dependence. The field dependence of the T^2 coefficient shows critical behavior with an exponent of ~4/3. This is evidence for a new field-induced quantum critical point, occuring in this case at a critical field which coincides with the superconducting upper critical field H_c2.

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Johnpierre Paglione, M. A. Tanatar, D. G. Hawthorn, Etienne Boaknin, R. W. Hill, F. Ronning, M. Sutherland, Louis Taillefer, C. Petrovic, P. C. Canfield. 2003-04-22. Field-induced quantum critical point in CeCoIn_5. https://doi.org/10.1016/j.physc.2004.03.120

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