  Inspired by the studies on the influence of transition metal impurities in
high Tc superconductors and what is already known about nonmagnetic suppression
of Tc in unconventional superconductors, we set out to investigate the behavior
of the nonmagnetic disordered elastic scattering for a realistic 2D anisotropic
high Tc superconductor with line nodes and a Fermi surface in the tight-binding
approximation. For this purpose, we performed a detailed self-consistent 2D
numerical study of the disordered averaged scattering matrix with nonmagnetic
impurities and a singlet line nodes order parameter, varying the concentration
and the strength of the impurities potential in the Born, intermediate and
unitary limits. In a high Tc anisotropic superconductor with a tight binding
dispersion law averaging over the Fermi surface, including hopping parameters
and an order parameter in agreement with experimental data, the tight-binding
approximation reflects the anisotropic effects. In this study, we also included
a detailed visualization of the behavior of the scattering matrix with
different sets of physical parameters involved in the nonmagnetic disorder,
which allowed us to model the dressed scattering behavior in different regimes
for very low and high energies. With this study, we demonstrate that the
scattering elastic matrix is affected by the non-magnetic disorder, as well as
the importance of an order parameter and a Fermi surface in agreement with
experiments when studying this effect in unconventional superconductors.
