Probing Intermolecular Coupled Vibrations by STM Inelastic Electron Tunneling Spectroscopy.

ORAL

Abstract

Intermolecular interactions can induce energy shifts and coupling of molecular vibrations. However, the detection of intermolecular coupled vibrations has not been reported at the single molecule level. Here we show the detection and identification of an intermolecular coupled vibration between two molecules, one on the substrate and the other one on the tip within the gap of a sub-Kelvin scanning tunneling microscope, by inelastic electron tunneling spectroscopy (IETS) and density functional calculations. Furthermore, the anisotropy of the molecular adsorption potential on the substrate is revealed by imaging the IETS intensity of the coupled vibration.

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Authors

  • Zhumin Han

    University of California, Irvine, UC Irvine

  • Gregory Czap

    University of California, Irvine, UC Irvine

  • Chen Xu

    University of California, Irvine

  • Chi-lun Chiang

    University of California, Irvine

  • Dingwang Yuan

    University of California, Irvine

  • Ruqian Wu

    Department of Physics and Astronomy, University of California, Irvine, Department of Physics, Fudan University, University of California, Irvine

  • Wilson Ho

    University of California, Irvine, University of California Irvine, Univ of California - Irvine, UC Irvine