Electron-phonon couplings at C60 interfaces: A case study by two-color, infrared-visible sum-frequency generation spectroscopy

Y. Caudano; C. Silien; C. Humbert; L. Dreesen; A. A. Mani; A. Peremans; P. A. Thiry

doi:10.1016/S0368-2048(03)00062-8

Electron-phonon couplings at C₆₀ interfaces: A case study by two-color, infrared-visible sum-frequency generation spectroscopy

Y. Caudano
, C. Silien
, C. Humbert
, L. Dreesen
, A. A. Mani
, A. Peremans
, P. A. Thiry

Universite de Namur

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

Abstract

We demonstrate the ability of doubly resonant sum-frequency generation (DR-SFG) to investigate electron-phonon couplings at C₆₀-metal interfaces. Due to its coupling to electronic transitions, the totally symmetric A_g(2) vibration of C₆₀ exhibits a huge enhancement of its nonlinear response for sum-frequency energies above the molecular electronic gap. We attribute this resonance to the coupling of the pentagonal pinch mode with the t_1u lowest unoccupied molecular orbital (LUMO) of C₆₀.

Original language	English
Pages (from-to)	139-147
Number of pages	9
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	129
Issue number	2-3
DOIs	https://doi.org/10.1016/S0368-2048(03)00062-8
Publication status	Published - Jun 2003
Externally published	Yes

Keywords

Alkali
Electron-phonon coupling
Electronic transition
Fullerenes
Silver
Sun-frequency generation

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10.1016/S0368-2048(03)00062-8

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title = "Electron-phonon couplings at C60 interfaces: A case study by two-color, infrared-visible sum-frequency generation spectroscopy",

abstract = "We demonstrate the ability of doubly resonant sum-frequency generation (DR-SFG) to investigate electron-phonon couplings at C60-metal interfaces. Due to its coupling to electronic transitions, the totally symmetric Ag(2) vibration of C60 exhibits a huge enhancement of its nonlinear response for sum-frequency energies above the molecular electronic gap. We attribute this resonance to the coupling of the pentagonal pinch mode with the t1u lowest unoccupied molecular orbital (LUMO) of C60.",

keywords = "Alkali, Electron-phonon coupling, Electronic transition, Fullerenes, Silver, Sun-frequency generation",

author = "Y. Caudano and C. Silien and C. Humbert and L. Dreesen and Mani, \{A. A.\} and A. Peremans and Thiry, \{P. A.\}",

year = "2003",

month = jun,

doi = "10.1016/S0368-2048(03)00062-8",

language = "English",

volume = "129",

pages = "139--147",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

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TY - JOUR

T1 - Electron-phonon couplings at C60 interfaces

T2 - A case study by two-color, infrared-visible sum-frequency generation spectroscopy

AU - Caudano, Y.

AU - Silien, C.

AU - Humbert, C.

AU - Dreesen, L.

AU - Mani, A. A.

AU - Peremans, A.

AU - Thiry, P. A.

PY - 2003/6

Y1 - 2003/6

N2 - We demonstrate the ability of doubly resonant sum-frequency generation (DR-SFG) to investigate electron-phonon couplings at C60-metal interfaces. Due to its coupling to electronic transitions, the totally symmetric Ag(2) vibration of C60 exhibits a huge enhancement of its nonlinear response for sum-frequency energies above the molecular electronic gap. We attribute this resonance to the coupling of the pentagonal pinch mode with the t1u lowest unoccupied molecular orbital (LUMO) of C60.

AB - We demonstrate the ability of doubly resonant sum-frequency generation (DR-SFG) to investigate electron-phonon couplings at C60-metal interfaces. Due to its coupling to electronic transitions, the totally symmetric Ag(2) vibration of C60 exhibits a huge enhancement of its nonlinear response for sum-frequency energies above the molecular electronic gap. We attribute this resonance to the coupling of the pentagonal pinch mode with the t1u lowest unoccupied molecular orbital (LUMO) of C60.

KW - Alkali

KW - Electron-phonon coupling

KW - Electronic transition

KW - Fullerenes

KW - Silver

KW - Sun-frequency generation

UR - https://www.scopus.com/pages/publications/0037602051

U2 - 10.1016/S0368-2048(03)00062-8

DO - 10.1016/S0368-2048(03)00062-8

M3 - Article

AN - SCOPUS:0037602051

SN - 0368-2048

VL - 129

SP - 139

EP - 147

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

IS - 2-3

ER -

Electron-phonon couplings at C₆₀ interfaces: A case study by two-color, infrared-visible sum-frequency generation spectroscopy

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Keywords

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