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1 PublikationAn intermediate morphology in the patterning of the crystalline Ge(001) surface induced by ion irradiation
Erb, D.; Pearson, D. A.; Skeren, T.; Engler, M.; Bradley, R. M.; Facsko, S.
Abstract
We investigate the morphologies of the Ge(001) surface that are produced by bombardment with a normally incident, broad argon ion beam at sample temperatures above the recrystallization temperature. Two previously-observed kinds of topographies are seen, i.e., patterns consisting of upright and inverted rectangular pyramids, as well as patterns composed of shallow, isotropic basins. In addition, we observe the formation of an unexpected third type of pattern for intermediate values of the temperature, ion energy and ion flux. In this type of intermediate morphology, isolated peaks with rectangular cross sections stand above a landscape of shallow, rounded basins. We also extend past theoretical work to include a second order correction term that comes from the curvature dependence of the sputter yield. For a range of parameter values, the resulting continuum model of the surface dynamics produces patterns that are remarkably similar to the intermediate morphologies we observe in our experiments. The formation of the isolated peaks is the result of a term that is not ordinarily included in the equation of motion, a second order correction to the curvature dependence of the sputter yield.
Beteiligte Forschungsanlagen
- Ionenstrahlzentrum DOI: 10.17815/jlsrf-3-159
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 36885) publication
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Data publication: Morphological transitions in the patterning of the …
ROBIS: 36887 HZDR-primary research data are used by this (Id 36885) publication
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Physical Review B 109(2024), 045439
DOI: 10.1103/PhysRevB.109.045439
Cited 1 times in Scopus
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