Journal Article

PreJuSER-14114

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Itinerant Nature of Atom-Magnetization Excitation by Tunneling Electrons

Khajetoorians, A. A. ; Lounis, S.FZJ* ; Chilian, B. ; Costa, A. T. ; Zhou, L. ; Mills, D. L. ; Wiebe, J. ; Wiesendanger, R.

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7277  doi:10.1103/PhysRevLett.106.037205

Abstract: We have performed single-atom magnetization curve (SAMC) measurements and inelastic scanning tunneling spectroscopy (ISTS) on individual Fe atoms on a Cu(111) surface. The SAMCs show a broad distribution of magnetic moments with 3.5 mu(B) being the mean value. ISTS reveals a magnetization excitation with a lifetime of 200 fsec which decreases by a factor of 2 upon application of a magnetic field of 12 T. The experimental observations are quantitatively explained by the decay of the magnetization excitation into Stoner modes of the itinerant electron system as shown by newly developed theoretical modeling.

Keyword(s): J

Note: We acknowledge funding from SFB668-A1 and GrK1286 of the DFG, from the ERC Advanced Grant FURORE, and from the Cluster of Excellence Nanospintronics funded by the Forschungs- und Wissenschaftsstiftung Hamburg. The research of D. L. M. and A. T. C. was supported by the U.S. Department of Energy, via Grant No. DE-FG03-84ER-45083. S. L. thanks the Alexander von Humboldt Foundation, and the DOE for partial support from the same DOE grant. Part of the computations were performed at the supercomputer JUROPA at the Forschungszentrum Julich.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)
2. Quanten-Theorie der Materialien (IAS-1)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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