Screening of magnetic moment at Co impurity in Cu host

Abstract

Cobalt impurity located in the bulk copper is described making use of the multi-orbital Anderson impurity model that is parametrized to match the electronic structure from the local density approximation, and solved using the Lanczos method. We concentrate on the many-body description of the ground state and excitation spectra. The calculations yield a nonmagnetic ground state for the impurity atom. The computed spectral densities are in a good agreement with those obtained using the quantum Monte Carlo method.

arXiv commentREVTeX 4-1, contribution to proceedings of WDS 2015, 6 pages, 4 figures. in WDS'15 Proceedings of Contributed Papers - Physics (eds. J. Safrankova and J. Pavlu), Prague, Matfyzpress, pp. 48-53, 2015