Normal-state Hall Angle and Magnetoresistance in Quasi-2D Heavy Fermion CeCoIn<sub>5</sub>near a Quantum Critical Point

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  • Nakajima Y.
    Institute for Solid State Physics, University of Tokyo
  • Izawa K.
    Institute for Solid State Physics, University of Tokyo
  • Matsuda Y.
    Institute for Solid State Physics, University of Tokyo
  • Uji S.
    National Institute of Material Science
  • Terashima T.
    National Institute of Material Science
  • Shishido H.
    Graduate School of Science, Osaka University
  • Settai R.
    Graduate School of Science, Osaka University
  • Onuki Y.
    Graduate School of Science, Osaka University
  • Kontani H.
    Department of Physics, Saitama University

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  • Normal-state Hall Angle and Magnetoresistance in Quasi-2D Heavy Fermion CeCoIn5 near a Quantum Critical Point

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The normal-state Hall effect and magnetoresisitance (MR) have been measured in the quasi two dimensional (2D) heavy fermion superconductor CeCoIn5. In the non-Fermi liquid region where the reistivity ρxx exhibits an almost perfect T-linear dependence, the Hall angle varies as cotθH∝T2 and MR displays a strong violation of Kohler’s rule. We demonstrate a novel relation between the MR and the Hall conductivity, Δρxx⁄ρxx∝(σxyρxx)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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