Virginia TechBowen, Samuel P.2014-05-072014-05-071978-10Bowen, S. P., "Configuration fluctuations and the dilute-magnetic-alloy problem," Phys. Rev. B 18, 3400 DOI: http://dx.doi.org/10.1103/PhysRevB.18.34000163-1829http://hdl.handle.net/10919/47817A new theoretical treatment of the Anderson model of transition-metal or rare-earth impurities in a simple metal is presented. This study treats the impurity Coulomb correlation exactly and the host impurity coupling to lowest order in the sense of a self-consistent degenerate perturbation theory. The central result of this work is that if an impurity interconfigurational excitation energy (ICEE) is close to the Fermi energy in the atomic limit, a temperature-dependent shift of the ICEE is found for the interacting system. This temperature-dependent shift is shown to give a good description of the experimental observations on dilute magnetic alloys.en-USIn Copyrightphysics, condensed matterArticle - Refereedhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.18.3400https://doi.org/10.1103/PhysRevB.18.3400