Journal
PHYSICAL REVIEW B
Volume 85, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.024536
Keywords
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Funding
- Leading Foreign Research Institute [2010-00471]
- National Research Foundation of Korea(NRF) [2010-0005669]
- POSTECH Basic Science Research Institute
- National Research Foundation of Korea [2010-00471, 2010-0005669] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The effects of isovalent Ru substitution at the Fe sites of BaFe2-xRuxAs2 are investigated by measuring resistivity (rho) and Hall coefficient (R-H) on high-quality single crystals in a wide range of doping (0 <= x <= 1.4). Ru substitution weakens the antiferromagnetic (AFM) order, inducing superconductivity for relatively high doping level of 0.4 <= x <= 0.9. Near the AFM phase boundary, the transport properties show non-Fermi-liquid-like behavior with a linear-temperature dependence of rho and a strong temperature dependence of R-H with a sign change. Upon higher doping, however, both rho and R-H recover conventional Fermi-liquid behavior. Strong doping dependence of R-H together with a small magnetoresistance suggest that the anomalous transport properties can be explained in terms of anisotropic charge carrier scattering due to interband AFM fluctuations rather than a conventional multiband scenario.
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