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Transient Gratings Formed by Nonequilibrium Quasiparticles in YBa2Cu3O6.5

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Abstract

We report transient grating measurements of nonequilibrium quasiparticles in untwinned single crystals of YBa2Cu3O6.5. By interfering two laser beams on the sample, we introduce a sinusoidally varying density of nonequilibrium quasiparticles. A third laser beam incident on this pattern is both reflected and diffracted due to the sinusoidally varying index change caused by photoinduced quasiparticles. In this paper, we focus on the low excitation density limit. In this limit, measuring the reflected and diffracted beams as a function of the time and grating period yields the diffusion constant and elastic scattering rate for these nonequilibrium quasiparticles.

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Authors and Affiliations

  1. Physics Department, University of California, Berkeley

    N. Gedik & J. Orenstein

  2. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720

    N. Gedik & J. Orenstein

  3. Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada, V6T 1Z1

    R. Liang, D. A. Bonn & W. N. Hardy

Authors
  1. N. Gedik
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  2. J. Orenstein
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  3. R. Liang
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  4. D. A. Bonn
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  5. W. N. Hardy
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Gedik, N., Orenstein, J., Liang, R. et al. Transient Gratings Formed by Nonequilibrium Quasiparticles in YBa2Cu3O6.5 . Journal of Superconductivity 17, 117–120 (2004). https://doi.org/10.1023/B:JOSC.0000011853.04776.a1

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  • DOI: https://doi.org/10.1023/B:JOSC.0000011853.04776.a1

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