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Phys Rev Lett. 2003 Jul 11;91(2):027401. Epub 2003 Jul 8.

Quasiparticle relaxation dynamics in heavy fermion compounds.

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  • 1Los Alamos National Laboratory, Mail Stop K764, Los Alamos, New Mexico 87545, USA.

Abstract

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 2 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 suppression of scattering between heavy electrons and phonons.

PMID:
12906507
[PubMed]
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