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Detection and Characterization of Anharmonic Overtone Vibrations of Single Molecules on a Metal Surface.
Czap, Gregory; Han, Zhumin; Wagner, Peter J; Ho, W.
Afiliación
  • Czap G; Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA.
  • Han Z; Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA.
  • Wagner PJ; Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA.
  • Ho W; Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA.
Phys Rev Lett ; 122(10): 106801, 2019 Mar 15.
Article en En | MEDLINE | ID: mdl-30932655
Inelastic electron tunneling spectroscopy (IETS) with the scanning tunneling microscope (STM) is a powerful technique used to characterize the vibration and spin states at the single-molecule level. While IETS lacks hard selection rules, historically it has been assumed that vibrational overtones are rarely seen or even absent. Here we provide definitive experimental evidence that the hindered rotation overtone excitation of carbon monoxide molecules adsorbed on Ag(110) can be detected with STM-IETS via isotope substitution. We also demonstrate that the anharmonicity of the overtone excitation can be characterized and compared between adsorption sites and find evidence of anisotropy in the vibrational anharmonicity for CO adsorbed on the [11[over ¯]0] step edge.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Phys Rev Lett Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Phys Rev Lett Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos