Diffusion of Nonequilibrium Quasi-Particles in a Cuprate Superconductor

+ See all authors and affiliations

Science  30 May 2003:
Vol. 300, Issue 5624, pp. 1410-1412
DOI: 10.1126/science.1083038

You are currently viewing the abstract.

View Full Text


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

View Full Text