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

S.DI NAPOLI; P. ROURA-BAS; M.A:BARRAL; A. ALIGIA; YURI MOKROUSOV; ANA MARÍA LLOIS

IEEE TRANSACTIONS ON MAGNETICS

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2013 vol. 49 p. 4683 - 4689

0018-9464

We analyze the conduction bands of the one dimensional noble-metal chains that contain a Co magnetic impurity by means of ab initiocalculations.We compare the results obtained for Cu and Ag pure chains, as well as O doped Cu, Ag and Au chains with those previouslyfound for Au pure chains.We find similar results in the case of Cu andAu 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-metalhosts. The d orbitals of Cu chains at the Fermi level have the same symmetry as in the case of Au chains. These orbitals hybridize withthe corresponding ones of the Co impurity, giving rise to the possibility of exhibiting a two-channel Kondo physics.