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Abrupt Transition in Quasiparticle Dynamics at Optimal Doping in a Cuprate Superconductor System

Gedik, N. and Langner, M. and Orenstein, J. and Ono, S. and Abe, Yasushi and Ando, Yoichi (2005) Abrupt Transition in Quasiparticle Dynamics at Optimal Doping in a Cuprate Superconductor System. Physical Review Letters, 95 (11). Art. no. 117005. ISSN 0031-9007. doi:10.1103/PhysRevLett.95.117005.

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We report time-resolved measurements of the photoinduced change in reflectivity, DeltaR, in the Bi2Sr2Ca1-yDyyCu2O8+delta (BSCCO) system of cuprate superconductors as a function of hole concentration. We find that the kinetics of quasiparticle decay and the sign of DeltaR 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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Additional Information:©2005 The American Physical Society (Received 15 March 2005; published 9 September 2005; corrected 22 September 2005) This work was supported by DOE-DE-AC03-76SF00098.
Subject Keywords:high-temperature superconductors; bismuth compounds; strontium compounds; calcium compounds; dysprosium compounds; quasiparticles; reflectivity; hole density; superconducting transition temperature; time resolved spectra; visible spectra
Issue or Number:11
Record Number:CaltechAUTHORS:GEDprl05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1438
Deposited By: Archive Administrator
Deposited On:18 Jan 2006
Last Modified:08 Nov 2021 19:10

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