Nature of Asymmetry in the Vibrational Line Shape of Single-Molecule Inelastic Electron Tunneling Spectroscopy with the STM

Chen Xu (徐晨), Chi-lun Chiang (蔣季倫), Zhumin Han (韩竹敏), and W. Ho
Phys. Rev. Lett. 116, 166101 – Published 21 April 2016
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Abstract

Single molecule vibrational spectroscopy and microscopy was demonstrated in 1998 by inelastic electron tunneling with the scanning tunneling microscope. To date, the discussion of its application has mainly focused on the spatial resolution and the spectral energy and intensity. Here we report on the vibrational line shape for a single carbon monoxide molecule that qualitatively exhibits inversion symmetry when it is transferred from the surface to the tip. The dependence of the line shape on the molecule’s asymmetric couplings in the tunnel junction can be understood from theoretical simulation and further validates the mechanisms of inelastic electron tunneling.

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  • Received 19 February 2016

DOI:https://doi.org/10.1103/PhysRevLett.116.166101

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsInterdisciplinary Physics

Authors & Affiliations

Chen Xu (徐晨)1, Chi-lun Chiang (蔣季倫)1, Zhumin Han (韩竹敏)1, and W. Ho1,2,*

  • 1Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
  • 2Department of Chemistry, University of California, Irvine, California 92697-2025, USA

  • *To whom correspondence should be addressed. wilsonho@uci.edu

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Vol. 116, Iss. 16 — 22 April 2016

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