Antiferromagnetism-superconductivity competition in electron-doped cuprates triggered by oxygen reduction

P. Richard; M. Neupane; Y. -M. Xu; P. Fournier; S. Li; Pengcheng Dai; Z. Wang; H. Ding

doi:10.1103/PhysRevLett.99.157002

Antiferromagnetism-superconductivity competition in electron-doped cuprates triggered by oxygen reduction

Superconductivity 2009-01-30 v1 Strongly Correlated Electrons

Authors: P. Richard , M. Neupane , Y. -M. Xu , P. Fournier , S. Li , Pengcheng Dai , Z. Wang , H. Ding

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Abstract

We have performed a systematic angle-resolved photoemission study of as-grown and oxygen-reduced Pr $_{2-x}$ Ce $_x$ CuO $_4$ and Pr $_{1-x}$ LaCe $_{x}$ CuO $_4$ electron-doped cuprates. In contrast to the common belief, neither the band filling nor the band parameters are significantly affected by the oxygen reduction process. Instead, we show that the main electronic role of the reduction process is to remove an anisotropic leading edge gap around the Fermi surface. While the nodal leading edge gap is induced by long-range antiferomagnetic order, the origin of the antinodal one remains unclear.

Keywords

electron-doped cuprates oxygen reduction antiferromagnetism superconductivity angle-resolved photoemission leading edge gap Fermi surface

Cite

@article{arxiv.0704.0453,
  title  = {Antiferromagnetism-superconductivity competition in electron-doped cuprates triggered by oxygen reduction},
  author = {P. Richard and M. Neupane and Y. -M. Xu and P. Fournier and S. Li and Pengcheng Dai and Z. Wang and H. Ding},
  journal= {arXiv preprint arXiv:0704.0453},
  year   = {2009}
}

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4 pages, 4 figures

Antiferromagnetism-superconductivity competition in electron-doped cuprates triggered by oxygen reduction

Abstract

Keywords

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