TY - JOUR
T1 - Doping effect on the carrier scattering in iron-pnictide superconductors studied by charge transport
AU - Ishida, Shigeyuki
AU - Nakajima, Masamichi
AU - Ishikado, Motoyuki
AU - Tomioka, Yasuhide
AU - Ito, Toshimitsu
AU - Miyazawa, Kiichi
AU - Lee, Chul Ho
AU - Kito, Hijiri
AU - Shamoto, Shin Ichi
AU - Iyo, Akira
AU - Eisaki, Hiroshi
AU - Kojima, Kenji M.
AU - Kakeshita, Teruhisa
AU - Uchida, Shin Ichi
N1 - Funding Information:
We would like to acknowledge K. Kuroki, H. Aoki, S. Ishibashi, and T. Miyake for helpful discussions. This work was supported by the Global Centers of Excellence Program and A3 Foresight Program from the Japan Society for the Promotion of Science and Transformative Research-Project on Iron Pnictides from the Japan Science and Technology Agency .
PY - 2011/5
Y1 - 2011/5
N2 - In order to reveal the role of carrier doping in the iron-based superconductors, we investigated the transport properties of the oxygen-deficient iron-arsenides LnFeAsO1-y (Ln=La, Ce, Pr and Nd) over a wide doping range. We found that the effect of doping in this system is mainly on the carrier scattering rather than carrier density, quite distinct from that in high-Tc cuprates. In the case of La system with lower Tc, the low temperature resistivity is dominated by T2 term and fairly large magnetoresistance is observed. On the other hand, in the Nd system with higher Tc, carriers are subject to stronger scattering showing nearly T-linear resistivity and small magnetoresistance. Such strong scattering appears intimately correlated with high-Tc superconductivity in the iron-based system.
AB - In order to reveal the role of carrier doping in the iron-based superconductors, we investigated the transport properties of the oxygen-deficient iron-arsenides LnFeAsO1-y (Ln=La, Ce, Pr and Nd) over a wide doping range. We found that the effect of doping in this system is mainly on the carrier scattering rather than carrier density, quite distinct from that in high-Tc cuprates. In the case of La system with lower Tc, the low temperature resistivity is dominated by T2 term and fairly large magnetoresistance is observed. On the other hand, in the Nd system with higher Tc, carriers are subject to stronger scattering showing nearly T-linear resistivity and small magnetoresistance. Such strong scattering appears intimately correlated with high-Tc superconductivity in the iron-based system.
UR - http://www.scopus.com/inward/record.url?scp=79955773744&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955773744&partnerID=8YFLogxK
U2 - 10.1016/j.jpcs.2010.10.054
DO - 10.1016/j.jpcs.2010.10.054
M3 - Article
AN - SCOPUS:79955773744
VL - 72
SP - 407
EP - 409
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
IS - 5
ER -