Electronic structure of ${\mathrm{CeCoIn}}_5$

A fully self-consistent procedure for obtaining the electronic structure of the superconductor ${\mathrm{CeCoIn}}_5$ is carried out by means of a local-density approximation potential within the augmented plane-wave framework. The results show that the electronic dynamic is fundamentally governed by the $4f$ states of Ce and $3d$ of Co which are close to $E_F.$ In addition, the weak hybridization between the states in the CeIn layer and the subsystem ${\mathrm{CoIn}}_4$ may imply a two dimensional structure which can serve as a scenario for a square Kondo/Ruderman-Kittel-Kasuya-Yosida lattice.