This review presents recent developments in the understanding of how impurities influence
the electronic states in the bulk properties of superconductors. The focus is on …

In materials with strong local Coulomb interactions, simple defects such as atomic
substitutions strongly affect both macroscopic and local properties of the system. A …

We consider the electronic structure near vacancies in the half-filled honeycomb lattice. It is
shown that vacancies induce the formation of localized states. When particle-hole symmetry …

We introduce a strong-disorder renormalization group (RG) approach suitable for
investigating the quasiparticle excitations of disordered superconductors in which the …

The effects of the electron-electron interactions in a graphene layer are investigated. It is
shown that short-range couplings are irrelevant and scale towards zero at low energies, due …

The physics of low-energy quasi-particle excitations in disordered d-wave superconductors
is a subject of ongoing intensive research. Over the last decade, a variety of conceptually …

The aim of this review is to summarize existing experimental investigations on the nature of
the low-energy quasiparticle excitations in high-T c cuprates, and to examine critically recent …

We present a theory for recent STM studies of Zn impurities in the superconductor Bi 2 Sr 2
CaCu 2 O 8+ δ, using insights from NMR experiments which show that there is a net S= 1/2 …

Theoretical studies of disordered d-wave superconductors have focused, with a few
exceptions, on optimally doped models with strong scatterers. Addressing recent …

We discuss the dynamics of magnetic moments in d-wave superconductors. In particular, we
focus on moments induced by doping nonmagnetic impurities into cuprates. The interaction …