Okabayashi, Norio and Gustafsson, Alexander and Peronio, Angelo and Paulsson, Magnus and Arai, Toyoko and Giessibl, Franz J. (2016) Influence of atomic tip structure on the intensity of inelastic tunneling spectroscopy data analyzed by combined scanning tunneling spectroscopy, force microscopy, and density functional theory. PHYSICAL REVIEW B, 93 (16): 165415. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
Achieving a high intensity in inelastic scanning tunneling spectroscopy (IETS) is important for precise measurements. The intensity of the IETS signal can vary by up to a factor of 3 for various tips without an apparent reason accessible by scanning tunneling microscopy (STM) alone. Here, we show that combining STM and IETS with atomic force microscopy enables carbon monoxide front-atom identification, revealing that high IETS intensities for CO/Cu(111) are obtained for single-atom tips, while the intensity drops sharply for multiatom tips. Adsorption of the CO molecule on a Cu adatom [CO/Cu/Cu(111)] such that the molecule is elevated over the substrate strongly diminishes the tip dependence of IETS intensity, showing that an elevated position channels most of the tunneling current through the CO molecule even for multiatom tips, while a large fraction of the tunneling current bypasses the CO molecule in the case of CO/Cu(111).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOLECULE VIBRATIONAL SPECTROSCOPY; RESOLUTION; CO; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Apr 2019 07:37 |
| Last Modified: | 05 Apr 2019 07:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3081 |
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