Theory of the fano resonance in the stm tunneling density of states due to a single kondo impurity

O. Újsághy, J. Kroha, L. Szunyogh, A. Zawadowski

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Abstract

The conduction electron density of states nearby single magnetic impurities, as measured recently by scanning tunneling microscopy (STM), is calculated, taking into account tunneling into conduction electron states only. The Kondo effect induces a narrow Fano resonance in the conduction electron density of states. The line shape varies with the distance between STM tip and impurity, in qualitative agreement with experiments, but is very 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.

Original languageEnglish
Pages (from-to)2557-2560
Number of pages4
JournalPhysical review letters
Volume85
Issue number12
DOIs
Publication statusPublished - Sep 18 2000

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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