Unusual Kondo Physics in a Co Impurity Atom Embedded in Noble-Metal Chains

• Published in: IEEE transactions on magnetics Vol. 49; no. 8; pp. 4683 - 4686
• Main Authors: Di Napoli, S., Barral, M. A., Roura-Bas, P., Aligia, A. A., Mokrousov, Y., Llois, A. M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.08.2013; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Atomic measurements; Color; Correlation; Cross-disciplinary physics: materials science; rheology; Doping; Exact sciences and technology; Gold; Impurities; Magnetic properties; Magnetism; Materials science; nanostructures; nanowires; Other topics in materials science; Physics; Noble metals; Nanostructures; Impurities; nanowires; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2013.2260730

We analyze the conduction bands of the one dimensional noble-metal chains that contain a Co magnetic impurity by means of ab initio calculations. We compare the results obtained for Cu and Ag pure chains, as well as O doped Cu, Ag and Au chains with those previously found for Au pure chains. We find similar results in the case of Cu and Au hosts, whereas for Ag chains a different behavior is obtained. Differences and similarities among the different systems are analyzed by comparing the electronic structure of the three noble-metal hosts. The d orbitals of Cu chains at the Fermi level have the same symmetry as in the case of Au chains. These orbitals hybridize with the corresponding ones of the Co impurity, giving rise to the possibility of exhibiting a two-channel Kondo physics.