  The in-plane resistivity of the high-temperature oxide superconductor
La$_{2-x}$Sr$_{x}$CuO$_{4}$ [LSCO] shows a strong growth of a contribution
linear in temperature as the doping is reduced in the overdoped region toward
optimal. This linear term is a signature of non-Fermi liquid behavior. We find
that the appearance of a linear term in the resistivity can arise in a
semiclassical Boltzmann transport theory which uses renormalized quasiparticle
scattering rates and an empirical band structure fitted to ARPES data on LSCO.
The linearized Boltzmann equation is solved numerically by discretizing the
Brillouin zone in a way that fits best to the Fermi surface geometry. The main
trends in the development of the anomalous temperature dependence are well
reproduced. There is a substantial underestimation of the magnitude of the
resistivity which is expected in view of the moderate to weak values we chose
for the onsite repulsion to stay within the one-loop renormalization group
approximation. The analysis was extended to the Seebeck coefficient with
similar agreement with the main trends in the data.
