Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-09-15
Phys. Rev. Lett. 101, 266403 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 2 figures; accepted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.101.266403
The temperature dependence of the interlayer electrical and thermal resistivity in a layered metal are calculated for Fermi liquid quasiparticles which are scattered inelastically by two-dimensional antiferromagnetic spin fluctuations. Both resistivities have a linear temperature dependence over a broad temperature range. Extrapolations to zero temperature made from this linear-$T$ range give values that appear to violate the Wiedemann-Franz law. However, below a low-temperature scale, which becomes small close to the critical point, a recovery of this law occurs. Our results describe recent measurements on CeCoIn$_5$ near a magnetic field-induced quantum phase transition. Hence, the experiments do not necessarily imply a non-Fermi liquid ground state.
McKenzie Ross H.
Smith Mark F.
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