Abrupt transition in quasiparticle dynamics at optimal doping in a cuprate superconductor system

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We report time-resolved measurements of the photoinduced change in reflectivity, Delta R, in the Bi2Sr2Ca(1-y)Dy(y)Cu2O(8+delta) (BSCCO) system of cuprate superconductors as a function of hole concentration. We find that the kinetics of quasiparticle decay and the sign of Delta R both change abruptly where the superconducting transition temperature Tc is maximal. These coincident changes suggest that a sharp transition in quasiparticle dynamics takes place precisely at optimal doping in the BSCCO system.
10 pages, 4 figures

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Superconductivity, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/95591

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0503355
 http://arxiv.org/abs/cond-mat/0503355
 Phys. Rev. Lett. 95, 117005 (2005)
 doi:10.1103/PhysRevLett.95.117005

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arXiv