Direct evidence of the contribution of surface states to the Kondo resonance

Q. Li, S. Yamazaki, T. Eguchi, H. Kim, Se-Jong Kahng, J. F. Jia, Q. K. Xue, Y. Hasegawa

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Using low-temperature scanning tunneling microscopy/spectroscopy, the Kondo resonance was observed on an isolated 5, 10, 15, 20-tetrakis-(4-bromophenyl)- porphyrin-Co (TBrPP-Co) molecule adsorbed on the Si (111) -3×3Ag substrate. As the substrate has a two-dimensional surface state and does not have bulk states around the Fermi level (EF), the Fano-shaped peak near EF observed above the molecule caging a spin-active cobalt atom is a direct evidence of the contribution of the surface-state electrons to the Kondo resonance. The long decay length (∼1.6nm) of the resonance also supports for the surface-state contribution.

Original languageEnglish
Article number115431
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number11
DOIs
Publication statusPublished - 2009 Sep 25

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Surface states
Molecules
Porphyrins
Scanning tunneling microscopy
Substrates
electron states
Cobalt
Fermi level
porphyrins
scanning tunneling microscopy
molecules
cobalt
Spectroscopy
Atoms
Electrons
decay
spectroscopy
atoms
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Direct evidence of the contribution of surface states to the Kondo resonance. / Li, Q.; Yamazaki, S.; Eguchi, T.; Kim, H.; Kahng, Se-Jong; Jia, J. F.; Xue, Q. K.; Hasegawa, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 11, 115431, 25.09.2009.

Research output: Contribution to journalArticle

Li, Q. ; Yamazaki, S. ; Eguchi, T. ; Kim, H. ; Kahng, Se-Jong ; Jia, J. F. ; Xue, Q. K. ; Hasegawa, Y. / Direct evidence of the contribution of surface states to the Kondo resonance. In: Physical Review B - Condensed Matter and Materials Physics. 2009 ; Vol. 80, No. 11.
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AU - Xue, Q. K.

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