Evolution from non-Fermi- to Fermi-liquid transport via isovalent doping in BaFe2(As1xPx)2 superconductors

S. Kasahara, T. Shibauchi, K. Hashimoto, K. Ikada, S. Tonegawa, R. Okazaki, H. Shishido, H. Ikeda, H. Takeya, K. Hirata, T. Terashima, and Y. Matsuda
Phys. Rev. B 81, 184519 – Published 19 May 2010

Abstract

The normal-state charge transport is studied systematically in high-quality single crystals of BaFe2(As1xPx)2 (0x0.71). By substituting isovalent P for As, the spin-density-wave (SDW) state is suppressed and the dome-shaped superconducting phase (Tc31K) appears. Near the SDW end point (x0.3), we observe striking linear temperature (T) dependence of resistivity in a wide T range, and remarkable low-T enhancement of Hall-coefficient magnitude from the carrier number estimates. We also find that the magnetoresistance apparently violates the Kohler’s rule and is well scaled by the Hall angle ΘH as Δρxx/ρxxtan2ΘH. These non-Fermi-liquid transport anomalies cannot be attributed to the simple multiband effects. These results capture universal features of correlated electron systems in the presence of strong antiferromagnetic fluctuations.

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  • Received 9 April 2010

DOI:https://doi.org/10.1103/PhysRevB.81.184519

©2010 American Physical Society

Authors & Affiliations

S. Kasahara1,2,*, T. Shibauchi3, K. Hashimoto3, K. Ikada3, S. Tonegawa3, R. Okazaki3, H. Shishido3, H. Ikeda3, H. Takeya2, K. Hirata2, T. Terashima1, and Y. Matsuda3

  • 1Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8502, Japan
  • 2Superconducting Materials Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
  • 3Department of Physics, Kyoto University, Kyoto 606-8502, Japan

  • *kasa@scphys.kyoto-u.ac.jp

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Vol. 81, Iss. 18 — 1 May 2010

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