Electron Energy Dissipation in the Normal State of Optimally Doped BSCCO

ORAL

Abstract

New time-resolved ARPES (trARPES) results for the normal state of optimally doped Bi2212 will be discussed. These measurements reveal three intrinsic timescales for relaxation of hot carriers: an electron-electron timescale $\tau_{\mathrm{ee}}$ and two electron-phonon timescales, $\tau_{\mathrm{short}}(E)$ and $\tau_{\mathrm{long}}(E)$. While $\tau_{\mathrm{ee}}(E)$, appears to be energy- and pump fluence-independent, $\tau_{\mathrm{short}}(E)$ and $\tau_{\mathrm{long}}(E)$ are found to be energy-dependent, with $\tau_{\mathrm{short}}(E)$ also fluence dependent. Further, a distinct step in $\tau_{\mathrm{short}}(E)$ at $E \sim 75$ meV above the Fermi energy is fount to originate from coupling of hot electrons to an optical phonon mode. The implications of these findings will be addressed.

*Work at Brookhaven National Laboratory was supported by the Center for Emergent Superconductivity

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Authors

  • Jonathan Rameau

    • Brookhaven National Laboratory, Upton, New York, 11973, USA

  • Simon Freutel

    • University Duisburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany

  • A.F. Kemper

    • Department of Physics, North Carolina State University

  • M.A. Sentef

    • Max Planck Institute for the Structure and Dynamics of Matter, HISKP, University of Bonn

  • J.K. Freericks

    • Dept. of Physics, Georgetown University

  • I. Avigo

    • University Duisburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany

  • M. Ligges

    • University Duisburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany

  • L. Rettig

    • University Duisburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany

  • Y. Yoshida

    • National Institute of Advanced Industrial Science and Technology Tsukuba, Ibaraki 305-8568, Japan

  • H. Eisaki

    • National Institute of Advanced Industrial Science and Technology Tsukuba, Ibaraki 305-8568, Japan

  • J. Schneeloch

    • Brookhaven National Laboratory, Upton, New York, 11973, USA

  • R.D. Zhong

    • Brookhaven National Laboratory, Upton, New York, 11973, USA

  • G.D. Gu

    • Brookhaven National Laboratory, Upton, New York, 11973, USA

  • P.D. Johnson

    • Brookhaven National Laboratory, Upton, New York, 11973, USA

  • U. Bovensiepen

    • University Duisburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany