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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...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Crystallographic Association
2015
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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. |
format | Online Article Text |
id | pubmed-4711617 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | American Crystallographic Association |
record_format | MEDLINE/PubMed |
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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