Electronic phase diagram of NdFe1-xRhxAsO

David Berardan; Lidong Zhao; Loreynne Pinsard-Gaudart; Nita Dragoe

doi:10.1103/PhysRevB.81.094506

Electronic phase diagram of NdFe1-xRhxAsO

Superconductivity 2010-03-15 v1

Authors: David Berardan , Lidong Zhao , Loreynne Pinsard-Gaudart , Nita Dragoe

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Abstract

We report on the electrical resistivity, thermoelectric power and electronic phase diagram of rhodium-doped NdFeAsO. Rhodium doping suppresses the structural phase transition and spin density wave observed in the undoped material, and superconductivity emerges at x close to 0.05, despite the distortion of FeAs4 tetrahedra induced by the large size difference between Rh and Fe elements. The Tc(x) curve is dome-like, and the highest Tc is reached at x = 0.1, with Tconset = 18K. An upturn of the electrical resistivity above Tc has been observed, with a Kondo like behaviour above Tc and a Fermi-liquid behaviour close to room temperature.

Keywords

electronic phase diagram rhodium doping superconductivity NdFeAsO spin density wave Kondo behavior Fermi-liquid behavior

Cite

@article{arxiv.1003.2528,
  title  = {Electronic phase diagram of NdFe1-xRhxAsO},
  author = {David Berardan and Lidong Zhao and Loreynne Pinsard-Gaudart and Nita Dragoe},
  journal= {arXiv preprint arXiv:1003.2528},
  year   = {2010}
}

Comments

17 pages, 10 figures

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