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The temperature dependence of the interlayer electrical and thermalresistivity in a layered metal are calculated for Fermi liquid quasiparticleswhich are scattered inelastically by two-dimensional antiferromagnetic spinfluctuations. Both resistivities have a linear temperature dependence over abroad temperature range. Extrapolations to zero temperature made from thislinear-$T$ range give values that appear to violate the Wiedemann-Franz law.However, below a low-temperature scale, which becomes small close to thecritical point, a recovery of this law occurs. Our results describe recentmeasurements on CeCoIn$_5$ near a magnetic field-induced quantum phasetransition. Hence, the experiments do not necessarily imply a non-Fermi liquidground state.

Apparent Violation of the Wiedemann-Franz law near a magnetic field tuned metal-antiferromagnetic quantum critical point