Electronic structure of C60 on Au(887)

F. Schiller; M. Ruiz-Osés; J. E. Ortega; P. Segovia; J. Martínez-Blanco; B. P. Doyle; V. Pérez-Dieste; J. Lobo; N. Néel; R. Berndt; J. Kröger

doi:10.1063/1.2354082

Electronic structure of C₆₀ on Au(887)

F. Schiller, M. Ruiz-Osés, J. E. Ortega, P. Segovia, J. Martínez-Blanco, B. P. Doyle, V. Pérez-Dieste, J. Lobo, N. Néel, R. Berndt, J. Kröger

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

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Abstract

We present an analysis of the electronic structure of C60 adsorbed on a vicinal Au(111) surface at different fullerene coverages using photoemission, x-ray absorption, and scanning tunneling microcopy/spectroscopy (STS). STS provides a straightforward determination of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) levels with respect to the Fermi energy. At C60 coverages of 0.5 and 1 ML a 2.7 eV wide HOMO-LUMO gap is found. The near-edge x-ray absorption fine structure (NEXAFS) spectrum for the 0.5 ML C60 nanomesh structure displays a significant intensity at the low energy side of the LUMO exciton peak, which is explained as due to absorption into HOMO-LUMO gap states localized at individual C60 cluster edges. From 0.5 to 1 ML we observe a rigid shift of the HOMO-LUMO peaks in the STS spectra and an almost complete quenching of the gap states feature in NEXAFS.

Original language	English
Article number	144719
Journal	Journal of Chemical Physics
Volume	125
Issue number	14
DOIs	https://doi.org/10.1063/1.2354082
Publication status	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Electronic structure of C60 on Au(887)",

abstract = "We present an analysis of the electronic structure of C60 adsorbed on a vicinal Au(111) surface at different fullerene coverages using photoemission, x-ray absorption, and scanning tunneling microcopy/spectroscopy (STS). STS provides a straightforward determination of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) levels with respect to the Fermi energy. At C60 coverages of 0.5 and 1 ML a 2.7 eV wide HOMO-LUMO gap is found. The near-edge x-ray absorption fine structure (NEXAFS) spectrum for the 0.5 ML C60 nanomesh structure displays a significant intensity at the low energy side of the LUMO exciton peak, which is explained as due to absorption into HOMO-LUMO gap states localized at individual C60 cluster edges. From 0.5 to 1 ML we observe a rigid shift of the HOMO-LUMO peaks in the STS spectra and an almost complete quenching of the gap states feature in NEXAFS.",

author = "F. Schiller and M. Ruiz-Os{\'e}s and Ortega, {J. E.} and P. Segovia and J. Mart{\'i}nez-Blanco and Doyle, {B. P.} and V. P{\'e}rez-Dieste and J. Lobo and N. N{\'e}el and R. Berndt and J. Kr{\"o}ger",

year = "2006",

doi = "10.1063/1.2354082",

language = "English",

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journal = "Journal of Chemical Physics",

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T1 - Electronic structure of C60 on Au(887)

AU - Schiller, F.

AU - Ruiz-Osés, M.

AU - Ortega, J. E.

AU - Segovia, P.

AU - Martínez-Blanco, J.

AU - Doyle, B. P.

AU - Pérez-Dieste, V.

AU - Lobo, J.

AU - Néel, N.

AU - Berndt, R.

AU - Kröger, J.

PY - 2006

Y1 - 2006

N2 - We present an analysis of the electronic structure of C60 adsorbed on a vicinal Au(111) surface at different fullerene coverages using photoemission, x-ray absorption, and scanning tunneling microcopy/spectroscopy (STS). STS provides a straightforward determination of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) levels with respect to the Fermi energy. At C60 coverages of 0.5 and 1 ML a 2.7 eV wide HOMO-LUMO gap is found. The near-edge x-ray absorption fine structure (NEXAFS) spectrum for the 0.5 ML C60 nanomesh structure displays a significant intensity at the low energy side of the LUMO exciton peak, which is explained as due to absorption into HOMO-LUMO gap states localized at individual C60 cluster edges. From 0.5 to 1 ML we observe a rigid shift of the HOMO-LUMO peaks in the STS spectra and an almost complete quenching of the gap states feature in NEXAFS.

AB - We present an analysis of the electronic structure of C60 adsorbed on a vicinal Au(111) surface at different fullerene coverages using photoemission, x-ray absorption, and scanning tunneling microcopy/spectroscopy (STS). STS provides a straightforward determination of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) levels with respect to the Fermi energy. At C60 coverages of 0.5 and 1 ML a 2.7 eV wide HOMO-LUMO gap is found. The near-edge x-ray absorption fine structure (NEXAFS) spectrum for the 0.5 ML C60 nanomesh structure displays a significant intensity at the low energy side of the LUMO exciton peak, which is explained as due to absorption into HOMO-LUMO gap states localized at individual C60 cluster edges. From 0.5 to 1 ML we observe a rigid shift of the HOMO-LUMO peaks in the STS spectra and an almost complete quenching of the gap states feature in NEXAFS.

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DO - 10.1063/1.2354082

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VL - 125

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 14

M1 - 144719

ER -

Electronic structure of C₆₀ on Au(887)

Abstract

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