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Non-Fermi liquid behavior in the magnetotransport of quasi two-dimensional heavy Fermion compounds CeMIn5 |
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| Authors: | Y. Nakajima T. Shibauchi H. Shishido K. Behnia M. Hedo T. Matsumoto Y. Onuki Y. Matsuda |
| Affiliation: | a Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan b Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan c Department of Applied Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan d Laboratoire de physique quantique (CNRS), ESPCI, 10 Rue Vauquelin, 75005 Paris, France e Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan f National Institute of Material Science, Sakura, Tsukuba, Ibaraki 305-0003, Japan g Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan h Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan |
| Abstract: | We observe several non-Fermi liquid behaviors in the normal-state transport properties of CeMIn5 (M: Rh and Co) under pressure at low temperatures: (1) The dc-resistivity shows T-linear dependence, ρxx∝T. (2) The magnitude of Hall coefficient |RH| 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,  . 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-Tc 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. |
| Keywords: | 74.20.Mn 74.25.Dw 74.25.Fy 74.70.Tx 75.47.&minus m |
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