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

Source: [Abrupt transition in quasiparticle dynamics at optimal doping in a cuprate superconductor system](<https://www.sota2.com/research/paper/68fa20067a2b558e2932e221>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-23T20:36:06.504Z

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

Published: 2005-03-15T06:47:38.000Z

## 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.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/0503355>)

[PDF](<https://arxiv.org/pdf/cond-mat/0503355.pdf>)