Quasiparticle relaxation dynamics in heavy fermion compounds

Details Quasiparticle relaxation dynamics in heavy fermion compounds Quasiparticle relaxation dynamics in heavy fermion compounds

2003-05-26

arxiv.org/abs/cond-mat/0305597v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.91.027401

We present the first femtosecond studies of electron-phonon (e-ph) thermalization in heavy fermion compounds. The e-ph thermalization time tau_{ep} increases below the Kondo temperature by more than two orders of magnitude as T = 0 K is approached. Analysis using the two-temperature model and numerical simulations based on Boltzmann's equations suggest that this anomalous slowing down of the e-ph thermalization derives from the large electronic specific heat and the suppresion of scattering between heavy electrons and phonons.

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