Impurity clusters and localization of nodal quasiparticles in \emph{d}-wave superconductors

Yu. G. Pogorelov, M. C. Santos, V. M. Loktev

The long disputed issue of the limiting value of quasiparticle density of states $\r(0) = \r (\e \to 0)$ in a \emph{d-}wave superconductor with impurities (\emph{vs} its linear van…