Phase diagram as a function of doping level and pressure in Eu$_{1-x}$La$_x$Fe$_2$As$_2$ system

M. Zhang; J. J. Ying; Y. J. Yan; A. F. Wang; X. F. Wang; Z. J. Xiang; G. J. Ye; P. Cheng; X. G. Luo; Jiangping Hu; X. H. Chen

doi:10.1103/PhysRevB.85.092503

Phase diagram as a function of doping level and pressure in Eu$_{1-x}$La$_x$Fe$_2$As$_2$ system

Superconductivity 2012-06-14 v1 Strongly Correlated Electrons

Authors: M. Zhang , J. J. Ying , Y. J. Yan , A. F. Wang , X. F. Wang , Z. J. Xiang , G. J. Ye , P. Cheng , X. G. Luo , Jiangping Hu , X. H. Chen

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Abstract

We establish the phase diagram of Eu $_{1-x}$ La $_x$ Fe $_2$ As $_2$ system as a function of doping level x and the pressure by measuring the resistivity and magnetic susceptibility. The pressure can suppress the spin density wave (SDW) and structural transition very efficiently, while enhance the antiferromagnetic (AFM) transition temperature T $_N$ of Eu $^{2+}$ . The superconductivity coexists with SDW order at the low pressure, while always coexists with the Eu $^{2+}$ AFM order. The results suggests that Eu $^{2+}$ spin dynamics is disentangeld with superconducting (SC) pairing taken place in the two-dimensional \emph{Fe-As} plane, but it can strongly affect superconducting coherence along c-axis.

Keywords

phase diagram spin density wave superconductivity antiferromagnetic order EuFe2As2

Cite

@article{arxiv.1201.1706,
  title  = {Phase diagram as a function of doping level and pressure in Eu$_{1-x}$La$_x$Fe$_2$As$_2$ system},
  author = {M. Zhang and J. J. Ying and Y. J. Yan and A. F. Wang and X. F. Wang and Z. J. Xiang and G. J. Ye and P. Cheng and X. G. Luo and Jiangping Hu and X. H. Chen},
  journal= {arXiv preprint arXiv:1201.1706},
  year   = {2012}
}

Phase diagram as a function of doping level and pressure in Eu$_{1-x}$La$_x$Fe$_2$As$_2$ system

Abstract

Keywords

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