Relaxation of Hot Quasiparticles in a d-Wave Superconductor

Details Relaxation of Hot Quasiparticles in a d-Wave Superconductor Relaxation of Hot Quasiparticles in a d-Wave Superconductor

2003-07-08

arxiv.org/abs/cond-mat/0307168v2

Phys. Rev. Lett. 92, 037003 (2004)

Physics

Condensed Matter

Superconductivity

Published version (references updated, minor modifications to text)

Scientific paper

10.1103/PhysRevLett.92.037003

Motivated by recent pump-probe experiments we consider the processes by which "hot" quasiparticles produced near the antinodes of a d-wave superconductor can relax. We show that in a large region of momentum space processes which break Cooper pairs are forbidden by energy and momentum conservation. Equilibration then occurs by scattering with thermal quasiparticles: Umklapp scattering is exponentially suppressed at low temperatures, but small-angle scattering leads to power-law behavior. By solving the Boltzmann equation analytically we make detailed predictions for the temperature and intensity dependence of these processes, which we compare with experiment.

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