Understanding anomalous properties of overdoped cuprates within the Landau-BCS paradigm

New experimental data on superfluid density and terahertz conductivity of overdoped LSCO have exhibited behavior incompatible with a clean BCSsuperconductor [1]. However, it has also been suggested that the properties observed are compatible with "dirty d-wave theory" assuming weak scattering by dopant atoms. We attempt to place this theory on a more quantitative basis by performing ab-initio calculations of dopant impurity potentials for LSCO and Tl-2201. These potentials are more complex than the pointlike impurity models considered previously, and require calculation of forward scattering corrections to transport properties. Including realistic, ARPES-derived bandstructures and Fermi liquid renormalizations, we show that the theory can explain semiquantitatively a wide variety of results on the two most studied overdoped materials, and make predictions for future measurements.