Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-08-29
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures. submitted
Scientific paper
10.1103/PhysRevB.74.132408
We report far-infrared optical properties of YbRh$_{2}$Si$_{2}$ for photon energies down to 2 meV and temperatures 0.4 -- 300 K. In the coherent heavy quasiparticle state, a linear dependence of the low-energy scattering rate on both temperature and photon energy was found. We relate this distinct dynamical behavior different from that of Fermi liquid materials to the non-Fermi liquid nature of YbRh$_{2}$Si$_{2}$ which is due to its close vicinity to an antiferromagnetic quantum critical point.
Ferstl J.
Geibel Ch.
Kimura Sachie
Krellner Cornelius
Sichelschmidt Joerg
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