Weyl semimetals are prominent examples of topologically protected quantum matter. These materials the three-dimensional counterparts graphene and great efforts being devoted to achieve a thorough understanding their fundamental physics. In this work, we aim at contributing end by discussing effect single magnetic impurity in as first step towards considering larger number impurities. We find th...

The effect of conduction electron interactions for an Anderson impurity is investigated in one dimension using a scaling approach. The flow diagrams are obtained by solving the renormalization group equations numerically. It is found that the Anderson impurity case is different from its counterpart – the Kondo impurity case even in the local moment region. The Kondo temperature for an Anderson ...

The quasiparticle resonant states around a single nonmagnetic impurity with unitary scattering in a d-wave superconductor is studied by solving the Bogoliubov–de Gennes equations based on a t-J model. Both the spatial variation of the order parameter and the local density of states ~LDOS! around the impurity have been investigated. We find that ~i! a particle-hole symmetric system has a single ...

The computation of the two-point correlation form factor K(τ) is performed for a rectangular billiard with a small size impurity inside for both periodic or Dirichlet boundary conditions. It is demonstrated that all terms of perturbation expansion of this form factor in powers of τ can be computed directly from a semiclassical trace formula. The main part of the calculation is the summation of ...