Direct evidence of the contribution of surface states to the Kondo resonance
- Authors
- Li, Q.; Yamazaki, S.; Eguchi, T.; Kim, H.; Kahng, S. -J.; Jia, J. F.; Xue, Q. K.; Hasegawa, Y.
- Issue Date
- 9월-2009
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.80, no.11
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 80
- Number
- 11
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119444
- DOI
- 10.1103/PhysRevB.80.115431
- ISSN
- 2469-9950
- 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)-root 3 x root 3Ag substrate. As the substrate has a two-dimensional surface state and does not have bulk states around the Fermi level (E-F), the Fano-shaped peak near E-F 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 (similar to 1.6 nm) of the resonance also supports for the surface-state contribution.
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