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.
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U2 - 10.1103/PhysRevB.80.115431
DO - 10.1103/PhysRevB.80.115431
M3 - Article
AN - SCOPUS:70350595888
SN - 0163-1829
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 -