Evidence for two fluids in the ground state of cuprates

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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}.
5 pages, 4 figures

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/117437

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0610595
 http://arxiv.org/abs/cond-mat/0610595

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arXiv