Normal-state Hall Angle and Magnetoresistance in quasi-2D Heavy Fermion CeCoIn5 near a Quantum Critical Point
Y. Nakajima, K. Izawa, Y. Matsuda, S. Uji, T. Terashima, H. Shishido, R. Settai, Y. Onuki, H. Kontani
Abstract
The normal-state Hall effect and magnetoresisitance (MR) have been measured in the quasi-2D heavy fermion superconductor CeCoIn5. In the non-Fermi liquid region where the reistivity rhoxx exhibits an almost perfect T-linear dependence, the Hall angle varies as cot thetaH propto T2 and the MR displays a strong violation of Kohler's rule. We demonstrate a novel relation between the MR and the Hall conductivity, Delta rhoxx/rhoxx propto (sigmaxy rhoxx)2. These results bear a striking resemblance to the normal-state properties of high-Tc cuprates, indicating universal transport properties in the presence of quasi-2D antiferromagnetic fluctuations near a quantum critical point.
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