Simulation of Local Surface Modification in STM byab initioQuantum Chemistry

V. S. Gurin ()
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V. S. Gurin: Physico-Chemical Research Institute, Belarussian State University, Leningradskaja str., 14, Minsk, 220080, Belarus

Surface Review and Letters (SRL), 1998, vol. 05, issue 02, 493-499

Abstract: Surface modification by means of STM has became a well-known method for the artificial formation of nanometer and atomic scale structures. The physical nature of surface modification can consist in a wide range of phenomena (from mechanical indentation up to specific tip-induced chemistry). The high electrical field at the STM tip is considered to be the main feature of STM modification experiments. The field strength is comparable with intramolecular ones and can influence the chemical bonding in surface structures. The model of STM-stimulated modification is considered using the quantum-chemicalab initioapproach for a surface cluster in the high electrical field. The destabilization effect, energy level shift, and bond polarization under the STM tip field occur and can show the atomistic nature of surface transformations in STM.

Date: 1998
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DOI: 10.1142/S0218625X98000864

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