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29 March 2024
 
  » arxiv » cond-mat/9501086

 Article overview


Resistivity as a function of temperature for models with hot spots on the Fermi surface.
R. Hlubina ; T. M. Rice ;
Date 19 Dec 1994
Subject cond-mat
AbstractWe calculate the resistivity $ ho$ as a function of temperature $T$ for two models currently discussed in connection with high temperature superconductivity: nearly antiferromagnetic Fermi liquids and models with van Hove singularities on the Fermi surface. The resistivity is calculated semiclassicaly by making use of a Boltzmann equation which is formulated as a variational problem. For the model of nearly antiferromagnetic Fermi liquids we construct a better variational solution compared to the standard one and we find a new energy scale for the crossover to the $ hopropto T^2$ behavior at low temperatures. This energy scale is finite even when the spin-fluctuations are assumed to be critical. The effect of additional impurity scattering is discussed. For the model with van Hove singularities a standard ansatz for the Boltzmann equation is sufficient to show that although the quasiparticle lifetime is anomalously short, the resistivity $ hopropto T^2ln(1/T)$.
Source arXiv, cond-mat/9501086
Other source [GID 730815] pmid9977567
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