Transition from antiferromagnetism to superconductivity in the compensated metallic state of Ba1-x Kx (Fe1-y Co y )2 As2

Shunpei Suzuki, Kenya Ohgushi, Yoko Kiuchi, Yutaka Ueda

研究成果: Article査読

8 被引用数 (Scopus)

抄録

We have investigated the electronic properties of Ba1-x K x ( Fe1-y Coy)2 As2 (0≤x≤0.51,0≤y≤0.22) single crystals with a special focus on the carrier compensated regions (x=2y). With increasing x and y under the x=2y constraint, the ground state changes from an antiferromagnetic metal to a paramagnetic metal with an intervening superconducting phase. On the basis of the Hall coefficient measurements, we show that this transition occurs in a coherent alloy with a Fermi surface similar to BaFe2 As2, and that the antiferromagnetic fluctuations are slightly weakened with increasing degree of alloying. We discuss the role of the randomness introduced by the substitution of Co2+ on this transition.

本文言語English
論文番号184510
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
82
18
DOI
出版ステータスPublished - 2010 11月 8
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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