Evidence for two fluids in the ground state of cuprates

Amit Keren; Amit Kanigel; Galina Bazalitsky

Evidence for two fluids in the ground state of cuprates

Superconductivity 2007-05-23 v1

Authors: Amit Keren , Amit Kanigel , Galina Bazalitsky

Abstract

We report charge density measurements, using NMR, in the superconducting compound (Ca_{x}La_{1-x})(Ba_{1.75-x}La_{0.25+x})Cu_3O_{y}, which has two independent variables x (family) and y (oxygen). For underdoped samples we find the rate at which holes are introduced into the plane upon oxygenation to be family-independent. In contrast, not all carriers contribute to either antiferromagnetic or superconducting order parameters. This result is consistent with a two fluid phenomenology or intrinsic mesoscopic inhomogeneities in the bulk. We also discuss the impact of weak-chemical-disorder on T_{c}.

Keywords

cuprates charge density NMR two fluid phenomenology underdoped superconductivity

Cite

@article{arxiv.cond-mat/0610595,
  title  = {Evidence for two fluids in the ground state of cuprates},
  author = {Amit Keren and Amit Kanigel and Galina Bazalitsky},
  journal= {arXiv preprint arXiv:cond-mat/0610595},
  year   = {2007}
}

Comments

5 pages, 4 figures

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