Quasiparticle relaxation dynamics in heavy fermion compounds |
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| Authors: | Demsar J Averitt R D Ahn K H Graf M J Trugman S A Kabanov V V Sarrao J L Taylor A J |
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| Affiliation: | Los Alamos National Laboratory, Mail Stop K764, Los Alamos, New Mexico 87545, USA. |
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| 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. |
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