Behavior of the Quantum Critical Point and the Fermi-Liquid Domain in the Heavy Fermion Superconductor CeCoIn5 Studied by Resistivity

概要

論文の詳細を見る
We report detailed very low temperatures resistivity measurements on the heavy fermion compounds Ce1-xLaxCoIn5 (x=0 and 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] directions. We found a Fermi liquid (\rho\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 H_{\text{c2}}(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.
2011-02-15