Non-Fermi liquid behavior in the magnetotransport of quasi two-dimensional heavy Fermion compounds CeMIn 5

Abstract

We observe several non-Fermi liquid behaviors in the normal-state transport properties of CeMIn 5 (M: Rh and Co) under pressure at low temperatures: (1) The dc-resistivity shows T-linear dependence, ρ xx ∝ T . (2) The magnitude of Hall coefficient | R H | increases rapidly with decreasing temperature, and reaches a value much larger than | 1 / ne | at low temperatures. (3) The magnetoresistance displays T- and H-dependence that strongly violate Kohler's rule, and is well scaled by the tangent of the Hall angle, Δ ρ xx / ρ xx ∝ tan 2 Θ H . These non-Fermi liquid properties in the electron transport are remarkably pronounced when the AF fluctuations are enhanced in the vicinity of the quantum critical point. Since all of these salient features have been also reported for high- T c cuprates, we infer that the non-Fermi liquid transport properties capture universal features of strongly correlated electron systems in the presence of strong antiferromagnetic fluctuations.