TY - JOUR
T1 - Strong carrier-scattering in iron-pnictide superconductors Ln FeAsO 1-y ( Ln=La and Nd) obtained from charge transport experiments
AU - Ishida, S.
AU - Nakajima, M.
AU - Tomioka, Y.
AU - Ito, T.
AU - Miyazawa, K.
AU - Kito, H.
AU - Lee, C. H.
AU - Ishikado, M.
AU - Shamoto, S.
AU - Iyo, A.
AU - Eisaki, H.
AU - Kojima, K. M.
AU - Uchida, S.
PY - 2010/3/16
Y1 - 2010/3/16
N2 - Characteristic normal-state charge transport is found in the oxygen-deficient iron-arsenides Ln FeAsO1-y (Ln: La and Nd) with the highest Tc's among known Fe-based superconductors. The effect of "doping" in this system is mainly on the carrier scattering, quite distinct from that in high- Tc cuprates. In the superconducting regime of the La system with maximum Tc =28 K, the low-temperature resistivity is dominated by a T2 term. On the other hand, in the Nd system with Tc higher than 40 K, the carriers are subject to stronger scattering showing T -linear resistivity and small magnetoresistance. Such strong scattering appears crucial for high- Tc superconductivity in the iron-based system.
AB - Characteristic normal-state charge transport is found in the oxygen-deficient iron-arsenides Ln FeAsO1-y (Ln: La and Nd) with the highest Tc's among known Fe-based superconductors. The effect of "doping" in this system is mainly on the carrier scattering, quite distinct from that in high- Tc cuprates. In the superconducting regime of the La system with maximum Tc =28 K, the low-temperature resistivity is dominated by a T2 term. On the other hand, in the Nd system with Tc higher than 40 K, the carriers are subject to stronger scattering showing T -linear resistivity and small magnetoresistance. Such strong scattering appears crucial for high- Tc superconductivity in the iron-based system.
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U2 - 10.1103/PhysRevB.81.094515
DO - 10.1103/PhysRevB.81.094515
M3 - Article
AN - SCOPUS:77954950387
VL - 81
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 9
M1 - 094515
ER -