title: Vibronic Spectroscopy with Submolecular Resolution from STM-Induced Electroluminescence.
abstract: A scanning tunneling microscope is used to generate the electroluminescence of phthalocyanine molecules deposited on NaCl/Ag(111). Photon spectra reveal an intense emission line at ≈1.9  eV that corresponds to the fluorescence of the molecules, and a series of weaker redshifted lines. Based on a comparison with Raman spectra acquired on macroscopic molecular crystals, these spectroscopic features can be associated with the vibrational modes of the molecules and provide a detailed chemical fingerprint of the probed species. Maps of the vibronic features reveal submolecularly resolved structures whose patterns are related to the symmetry of the probed vibrational modes.
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Doppagne
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Chong
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Etienne
authors.initials: E
authors.lastname: Lorchat
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Berciaud
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Michelangelo
authors.initials: M
authors.lastname: Romeo
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Hervé
authors.initials: H
authors.lastname: Bulou
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Alex
authors.initials: A
authors.lastname: Boeglin
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Fabrice
authors.initials: F
authors.lastname: Scheurer
authors.affiliation: Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Schull