Single-Impurity Problem in Iron-Pnictide Superconductors
Single-Impurity Problem in Iron-Pnictide Superconductors
The single-impurity problem in iron-pnictide superconductors is investigated by solving the Bogoliubov–de Gennes (BdG) equation in a microscopic multiorbital model. We construct a five-orbital model suitable for the BdG analysis, which reproduces the results of random phase approximation in a uniform case. Using this model, we study the local density …