Emmrich, Matthias and Schneiderbauer, Maximilian and Huber, Ferdinand and Weymouth, Alfred J. and Okabayashi, Norio and Giessibl, Franz J. (2015) Force Field Analysis Suggests a Lowering of Diffusion Barriers in Atomic Manipulation Due to Presence of STM Tip. PHYSICAL REVIEW LETTERS, 114 (14): 146101. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We study the physics of atomic manipulation of CO on a Cu(111) surface by combined scanning tunneling microscopy and atomic force microscopy at liquid helium temperatures. In atomic manipulation, an adsorbed atom or molecule is arranged on the surface using the interaction of the adsorbate with substrate and tip. While previous experiments are consistent with a linear superposition model of tip and substrate forces, we find that the force threshold depends on the force field of the tip. Here, we use carbon monoxide front atom identification (COFI) to characterize the tip's force field. Tips that show COFI profiles with an attractive center can manipulate CO in any direction while tips with a repulsive center can only manipulate in certain directions. The force thresholds are independent of bias voltage in a range from 1 to 10 mV and independent of temperature in a range of 4.5 to 7.5 K.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING-TUNNELING-MICROSCOPE; SINGLE ATOMS; LATERAL MANIPULATION; MOLECULES; SURFACE; DYNAMICS; |
| 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: | 22 Jul 2019 08:20 |
| Last Modified: | 22 Jul 2019 08:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5650 |
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