Publikation: The influence of tip-sample interaction on step fluctuations on Ag (111)
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1998
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Surface Science. 1998, 400(1-3), pp. 80-86. Available under: doi: 10.1016/S0039-6028(97)00843-1
Zusammenfassung
The fluctuations of the position of monatomic steps on Ag (111) are investigated by Scanning Tunneling Microscopy (STM). We analyze the influence of tip-sample interaction by varying the gap impedance over more than two orders of magnitude. For tunneling tips providing a weak tip-sample interact ion, we show that the step position autocorrelation function remains essentially unaltered. In this unperturbed case, the kinetics of step fluctuations are found to be dominated by one-dimensional mass transport. For larger variations of tip-sample distance or for less favorable tip configurations we observe a tip-induced increase of the step fluctuations. Our measurements suggest that this effect is rather caused by short-range forces than by the electric field in the tunneling gap.
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530 Physik
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Scanning tunneling microscopy, Silver, Surface diffusion, Low index single crystal surfaces
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MUGELE, Frieder, Armin RETTENBERGER, Johannes BONEBERG, Paul LEIDERER, 1998. The influence of tip-sample interaction on step fluctuations on Ag (111). In: Surface Science. 1998, 400(1-3), pp. 80-86. Available under: doi: 10.1016/S0039-6028(97)00843-1BibTex
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year={1998},
doi={10.1016/S0039-6028(97)00843-1},
title={The influence of tip-sample interaction on step fluctuations on Ag (111)},
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volume={400},
journal={Surface Science},
pages={80--86},
author={Mugele, Frieder and Rettenberger, Armin and Boneberg, Johannes and Leiderer, Paul}
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<dcterms:abstract xml:lang="eng">The fluctuations of the position of monatomic steps on Ag (111) are investigated by Scanning Tunneling Microscopy (STM). We analyze the influence of tip-sample interaction by varying the gap impedance over more than two orders of magnitude. For tunneling tips providing a weak tip-sample interact ion, we show that the step position autocorrelation function remains essentially unaltered. In this unperturbed case, the kinetics of step fluctuations are found to be dominated by one-dimensional mass transport. For larger variations of tip-sample distance or for less favorable tip configurations we observe a tip-induced increase of the step fluctuations. Our measurements suggest that this effect is rather caused by short-range forces than by the electric field in the tunneling gap.</dcterms:abstract>
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