Abrupt recovery of Fermi-liquid transport following the collapse of the c axis in CaFe2(As1-xPx)2 single crystals

S. Kasahara, T. Shibauchi, K. Hashimoto, Y. Nakai, H. Ikeda, T. Terashima, Y. Matsuda

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49 Citations (Scopus)


Single crystals of CaFe2(As1-xPx) 2 are found to exhibit the tetragonal (T) to collapsed-tetragonal (cT) transition at TcT100 K for x0.05. The c-axis shrinks by ~9% below TcT, which substantially diminishes the interband nesting between the hole and electron bands. In sharp contrast to the superconducting T phase of AFe2(As1-xPx)2 (A= Ba, Sr), where the anomalous non-Fermi liquid transport properties are observed, the resistivity, Hall coefficient, and magnetoresistance data in the Ca-based system all indicate that the standard Fermi liquid behaviors are recovered abruptly below TcT, and the superconductivity disappears completely. The simultaneous disappearance of the superconductivity and the non-Fermi liquid transport enlightens the essential role of interband-associated fluctuations to the superconductivity in Fe pnictides.

Original languageEnglish
Article number060505
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
Publication statusPublished - Feb 11 2011
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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