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arXiv · 1009.4894

Behavior of the Quantum Critical Point and the Fermi-liquid Domain in the Heavy Fermion Superconductor CeCoIn5 studied by resistivity

Ludovic Howald·Gabriel Seyfarth·Georg Knebel·Gerard Lapertot·Dai Aoki·Jean-Pascal Brison
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Abstract

We report detailed very low temperature resistivity measurements on the heavy fermion compounds Ce_{1-x}La_{x}CoIn5 (x=0 and x=0.01), with current applied in two crystallographic directions [100] (basal plane) and [001] (perpendicular to the basal plane) under magnetic field applied in the [001] or [011] direction. We found a Fermi liquid (ρ\propto T^{2}) ground state, in all cases, for fields above the superconducting upper critical field. We discuss the possible location of a field induced quantum critical point with respect to Hc2(0), and compare our measurements with the previous reports in order to give a clear picture of the experimental status on this long debated issue.

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Ludovic Howald, Gabriel Seyfarth, Georg Knebel, Gerard Lapertot, Dai Aoki, Jean-Pascal Brison. 2011-02-06. Behavior of the Quantum Critical Point and the Fermi-liquid Domain in the Heavy Fermion Superconductor CeCoIn5 studied by resistivity. https://doi.org/10.1143/jpsj.80.024710

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