Doping effect on the carrier scattering in iron-pnictide superconductors studied by charge transport

Shigeyuki Ishida, Masamichi Nakajima, Motoyuki Ishikado, Yasuhide Tomioka, Toshimitsu Ito, Kiichi Miyazawa, Chul Ho Lee, Hijiri Kito, Shin Ichi Shamoto, Akira Iyo, Hiroshi Eisaki, Kenji M. Kojima, Teruhisa Kakeshita, Shin Ichi Uchida

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)407-409
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume72
Issue number5
DOIs
Publication statusPublished - 2011 May

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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