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Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001)

Ultrafast high energy electron diffraction in reflection geometry is employed to study the structural dynamics of self-organized Germanium hut-, dome-, and relaxed clusters on Si(001) upon femtosecond laser excitation. Utilizing the difference in size and strain state the response of hut- and dome c...

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Autores principales: Frigge, T., Hafke, B., Tinnemann, V., Witte, T., Horn-von Hoegen, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Crystallographic Association 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4711617/
https://www.ncbi.nlm.nih.gov/pubmed/26798797
http://dx.doi.org/10.1063/1.4922023
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author Frigge, T.
Hafke, B.
Tinnemann, V.
Witte, T.
Horn-von Hoegen, M.
author_facet Frigge, T.
Hafke, B.
Tinnemann, V.
Witte, T.
Horn-von Hoegen, M.
author_sort Frigge, T.
collection PubMed
description Ultrafast high energy electron diffraction in reflection geometry is employed to study the structural dynamics of self-organized Germanium hut-, dome-, and relaxed clusters on Si(001) upon femtosecond laser excitation. Utilizing the difference in size and strain state the response of hut- and dome clusters can be distinguished by a transient spot profile analysis. Surface diffraction from {105}-type facets provide exclusive information on hut clusters. A pixel-by-pixel analysis of the dynamics of the entire diffraction pattern gives time constants of 40, 160, and 390 ps, which are assigned to the cooling time constants for hut-, dome-, and relaxed clusters.
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spelling pubmed-47116172016-01-21 Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001) Frigge, T. Hafke, B. Tinnemann, V. Witte, T. Horn-von Hoegen, M. Struct Dyn ARTICLES Ultrafast high energy electron diffraction in reflection geometry is employed to study the structural dynamics of self-organized Germanium hut-, dome-, and relaxed clusters on Si(001) upon femtosecond laser excitation. Utilizing the difference in size and strain state the response of hut- and dome clusters can be distinguished by a transient spot profile analysis. Surface diffraction from {105}-type facets provide exclusive information on hut clusters. A pixel-by-pixel analysis of the dynamics of the entire diffraction pattern gives time constants of 40, 160, and 390 ps, which are assigned to the cooling time constants for hut-, dome-, and relaxed clusters. American Crystallographic Association 2015-06-05 /pmc/articles/PMC4711617/ /pubmed/26798797 http://dx.doi.org/10.1063/1.4922023 Text en © 2015 Author(s). 2329-7778/2015/2(3)/000000/10 All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
spellingShingle ARTICLES
Frigge, T.
Hafke, B.
Tinnemann, V.
Witte, T.
Horn-von Hoegen, M.
Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001)
title Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001)
title_full Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001)
title_fullStr Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001)
title_full_unstemmed Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001)
title_short Spot profile analysis and lifetime mapping in ultrafast electron diffraction: Lattice excitation of self-organized Ge nanostructures on Si(001)
title_sort spot profile analysis and lifetime mapping in ultrafast electron diffraction: lattice excitation of self-organized ge nanostructures on si(001)
topic ARTICLES
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4711617/
https://www.ncbi.nlm.nih.gov/pubmed/26798797
http://dx.doi.org/10.1063/1.4922023
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