Disorder, Metal-Insulator crossover and Phase diagram in high-Tc cuprates

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dc.creatorRullier-Albenque, F.
dc.creatorAlloul, H.
dc.creatorBalakirev, F.
dc.creatorProust, C.
dc.date2007-10-19
dc.date2008-02-13
dc.date.accessioned2026-07-07T09:20:06Z
dc.date.available2026-07-07T09:20:06Z
dc.descriptionWe have studied the influence of disorder induced by electron irradiation on the normal state resistivities $ρ(T)$ of optimally and underdoped YBa2CuOx single crystals, using pulsed magnetic fields up to 60T to completely restore the normal state. We evidence that point defect disorder induces low T upturns of rho(T) which saturate in some cases at low T in large applied fields as would be expected for a Kondo-like magnetic response. Moreover the magnitude of the upturns is related to the residual resistivity, that is to the concentration of defects and/or their nanoscale morphology. These upturns are found quantitatively identical to those reported in lower Tc cuprates, which establishes the importance of disorder in these supposedly pure compounds. We therefore propose a realistic phase diagram of the cuprates, including disorder, in which the superconducting state might reach the antiferromagnetic phase in the clean limit.
dc.descriptionversion 2 with minor changes
dc.identifierhttps://arxiv.org/abs/0710.3737
dc.identifierhttp://arxiv.org/abs/0710.3737
dc.identifierEPL 81, 37008 (2008)
dc.identifierdoi:10.1209/0295-5075/81/37008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154621
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleDisorder, Metal-Insulator crossover and Phase diagram in high-Tc cuprates
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