Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-05-26
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.
Ahn Kang-Hun
Averitt Richard D.
Demsar Jure
Graf Matthias. J.
Kabanov Vladimir V.
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