Journal Article

PreJuSER-19948

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Anomalously large g factor of single atoms adsorbed on a metal substrate

Chilian, B. ; Khajetoorians, A. A. ; Lounis, S.FZJ* ; Costa, A. T. ; 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/2128/10877  doi:10.1103/PhysRevB.84.212401

Abstract: We have performed inelastic scanning tunneling spectroscopy (ISTS) on individual Fe atoms adsorbed on a Ag(111) surface. ISTS reveals a magnetization excitation with a lifetime of about 400 fs, which decreases linearly upon application of a magnetic field. Surprisingly, we find that the g factor, which characterizes the shift in energy of the excitation in a magnetic field, is g = 3.1 instead of the expected value of 2. This very large g shift can be understood when considering the complete electronic structure of both the Ag(111) surface state and the Fe atom, as shown by ab initio calculations of the magnetic susceptibility.

Keyword(s): J

Note: We would like to thank W. Wulfhekel and P. Gambardella for fruitful discussions. We acknowledge funding from Grants No. SFB668-A1 and No. GrK1286 of the DFG, from ERC Advanced Grant "FURORE," and from the Cluster of Excellence "Nanospintronics." The research of D. L. M. and A. T. C. was supported by the US Department of Energy via Grant No. DE-FG03-84ER-45083. S. L. acknowledges the support of HGF-YIG Programme No. VH-NG-717.

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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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