Variation in electronic state of Ba(Fe 1-xCo x) 2As 2 alloy as investigated in terms of transport properties

Naoyuki Katayama, Yoko Kiuchi, Yoshitaka Matsushita, Kenya Ohgushi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We investigate the in-plane transport properties of the electron-doped iron arsenide superconductor Ba(Fe 1-xCo x) 2As 2 (0 ≤ x ≤ 1). We observe a non-Fermi-liquid behavior characterized by an incoherent resistivity and a low-temperature increase in Hall coefficient (R H) at x ≤ 0:14. We discuss this feature in terms of antiferromagnetic fluctuations. We find that the effective carrier density per Fe/Co atom n eff = - V/(eR H) (V is the volume per Fe/Co atom and e is the elementary electric charge) at 250 K exhibits a nonmonotonic x dependence with a minimum value at x ∼ 0:1, which is considered to reflect the disappearance of hole Fermi surfaces. We discuss the interrelationships among superconductivity, magnetism, and band nesting.

Original languageEnglish
Article number123702
Journaljournal of the physical society of japan
Volume78
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1
Externally publishedYes

Keywords

  • BaCo As
  • BaFe As
  • Hall effect
  • Iron arsenide superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Variation in electronic state of Ba(Fe <sub>1-x</sub>Co <sub>x</sub>) <sub>2</sub>As <sub>2</sub> alloy as investigated in terms of transport properties'. Together they form a unique fingerprint.

  • Cite this