Diffusion of Nonequilibrium Quasiparticles in a Cuprate Superconductor

Details Diffusion of Nonequilibrium Quasiparticles in a Cuprate Superconductor Diffusion of Nonequilibrium Quasiparticles in a Cuprate Superconductor

2003-09-08

arxiv.org/abs/cond-mat/0309203v2

Science 300, 1410 (2003)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

10.1126/science.1083038

We report a transport study of nonequilibrium quasiparticles in a high-Tc cuprate superconductor using the transient grating technique. Low-intensity laser excitation (at photon energy 1.5 eV) was used to introduce a spatially periodic density of quasiparticles into a high-quality untwinned single crystal of YBa2Cu3O6.5. Probing the evolution of the initial density through space and time yielded the quasiparticle diffusion coefficient, and both inelastic and elastic scattering rates. The technique reported here is potentially applicable to precision measurement of quasiparticle dynamics, not only in cuprate superconductors, but in other electronic systems as well.

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