First observation of a fully magnetic 4d impurity on the surface of Au
Department of Physics
of Southern California - Los Angeles, California 90089-0484
Accepted: 19 January 1996
We observe for the first time a fully magnetic 4d surface impurity on the surface of a noble metal. Au films are covered with 1/100 of a monolayer of Mo. The Mo atoms cause a dephasing of the conduction electron coherence which is of the same order of magnitude as the dephasing by magnetic Fe atoms. The dephasing is measured by weak localization and proves the strong magnetic character of the Mo atoms. The magnetic character of Mo is investigated up to a coverage of one monolayer. The dephasing per Mo atom strongly diminishes with increasing Mo coverage.
PACS: 75.20.Hr – Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions / 73.20.Hb – Impurity and defect levels; energy states of adsorbed species / 73.20.Fz – Weak localization effects (e.g., quantized states)
© EDP Sciences, 1996