Theory of STM Spectroscopy of Kondo Ions on Metal Surfaces

Details Theory of STM Spectroscopy of Kondo Ions on Metal Surfaces Theory of STM Spectroscopy of Kondo Ions on Metal Surfaces

2000-09-22

arxiv.org/abs/cond-mat/0009351v1

in "Kondo Effect and dephasing in low-dimensional metallic systems", NATO Science Series II, vol. 50, 245 (Kluwer Academic Pub

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, presented at the NATO Advanced Research Workshop on "Size Dependent Magnetic Scattering", Pecs, Hungary, M

Scientific paper

The conduction electron density of states nearby a single magnetic impurity, as measured recently by scanning tunneling microscopy (STM), is calculated. It is shown that the Kondo effect induces a narrow Fano resonance as an intrinsic feature in the conduction electron density of states. The line shape varies with the distance between STM tip and impurity, in qualitative agreement with experiments, and is sensitive to details of the band structure. For a Co impurity the experimentally observed width and shift of the Kondo resonance are in accordance with those obtained from a combination of band structure and strongly correlated calculations.

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