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

N. Gedik; J. Orenstein; S. Ono; Yasushi Abe; Yoichi Ando

doi:10.1103/PhysRevLett.95.117005

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

Superconductivity 2007-05-23 v1 Strongly Correlated Electrons

Authors: N. Gedik , J. Orenstein , S. Ono , Yasushi Abe , Yoichi Ando

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Abstract

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.

Keywords

cuprate superconductors high-temperature superconductivity superconductivity

Cite

@article{arxiv.cond-mat/0503355,
  title  = {Abrupt transition in quasiparticle dynamics at optimal doping in a cuprate superconductor system},
  author = {N. Gedik and J. Orenstein and S. Ono and Yasushi Abe and Yoichi Ando},
  journal= {arXiv preprint arXiv:cond-mat/0503355},
  year   = {2007}
}

Comments

10 pages, 4 figures

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