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

Q. Li; S. Yamazaki; T. Eguchi; H. Kim; S. J. Kahng; J. F. Jia; Q. K. Xue; Y. Hasegawa

doi:10.1103/PhysRevB.80.115431

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

Q. Li^*, S. Yamazaki, T. Eguchi, H. Kim, S. J. Kahng, J. F. Jia, Q. K. Xue, Y. Hasegawa

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

18 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 language	English
Article number	115431
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.80.115431
Publication status	Published - 2009 Sept 25

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.80.115431

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title = "Direct evidence of the contribution of surface states to the Kondo resonance",

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.",

author = "Q. Li and S. Yamazaki and T. Eguchi and H. Kim and Kahng, \{S. J.\} and Jia, \{J. F.\} and Xue, \{Q. K.\} and Y. Hasegawa",

year = "2009",

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doi = "10.1103/PhysRevB.80.115431",

language = "English",

volume = "80",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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TY - JOUR

T1 - Direct evidence of the contribution of surface states to the Kondo resonance

AU - Li, Q.

AU - Yamazaki, S.

AU - Eguchi, T.

AU - Kim, H.

AU - Kahng, S. J.

AU - Jia, J. F.

AU - Xue, Q. K.

AU - Hasegawa, Y.

PY - 2009/9/25

Y1 - 2009/9/25

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/70350595888

U2 - 10.1103/PhysRevB.80.115431

DO - 10.1103/PhysRevB.80.115431

M3 - Article

AN - SCOPUS:70350595888

SN - 1098-0121

VL - 80

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 11

M1 - 115431

ER -

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

Abstract

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