Evolution from non-Fermi- to Fermi-liquid transport via isovalent doping in BaFe2(As1-xPx)2 superconductors

The normal-state charge transport is studied systematically in high-quality single crystals of BaFe2(As1-xPx)(2) (0 <= x <= 0.71). By substituting isovalent P for As, the spin-density-wave (SDW) state is suppressed and the dome-shaped superconducting phase (T-c less than or similar to 31 K) appears. Near the SDW end point (x approximate to 0.3), 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 Theta(H) as Delta rho(xx)/rho(xx) alpha tan(2) Theta(H). 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 antiferro-magnetic fluctuations.