Two-Component Dynamics of the Order Parameter of High Temperature Bi2Sr2CaCu2O8+δ Superconductors Revealed by Time-Resolved Raman Scattering

R. P. Saichu, I. Mahns, A. Goos, S. Binder, P. May, S. G. Singer, B. Schulz, A. Rusydi, J. Unterhinninghofen, D. Manske, P. Guptasarma, M. S. Williamsen, and M. Rübhausen
Phys. Rev. Lett. 102, 177004 – Published 29 April 2009
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    Abstract

    We study the dynamics of the superconducting order parameter in the high-Tc cuprate Bi2Sr2CaCu2O8+δ by employing a novel time-resolved pump-probe Raman experiment. We find two different coupling mechanisms that contribute equally to the pair-breaking peak. One coupling sets in very fast at 2 ps and relaxes slowly, while the other one is delayed and sets in roughly at 5 ps and relaxes fast. A model that couples holes through phonons is able to reproduce one part of the condensate dynamics; thus, we argue that hole-spin interactions are of importance as well.

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    • Received 2 December 2008

    DOI:https://doi.org/10.1103/PhysRevLett.102.177004

    ©2009 American Physical Society

    Authors & Affiliations

    R. P. Saichu1, I. Mahns1, A. Goos1, S. Binder1, P. May1, S. G. Singer1, B. Schulz1, A. Rusydi1,2, J. Unterhinninghofen3, D. Manske4, P. Guptasarma5, M. S. Williamsen5, and M. Rübhausen1,*

    • 1Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany, Center for Free Electron Laser Science (CFEL), Notkestrasse 85, D-22607 Hamburg, Germany
    • 2NanoCore, Department of Physics, Faculty of Science, National University of Singapore, Singapore 117542, Singapore
    • 3Institut für Theoretische Physik, Universität Bremen, Postfach 330440, D-28334 Bremen, Germany
    • 4Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
    • 5Department of Physics, University of Wisconsin, Milwaukee, Wisconsin 53211, USA

    • *ruebhausen@physnet.uni-hamburg.de

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    Vol. 102, Iss. 17 — 1 May 2009

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