publication . Article . Other literature type . Preprint . 2020

Insights into image contrast from dislocations in ADF-STEM

E. Oveisi; M.C. Spadaro; E. Rotunno; V. Grillo; C. Hébert;
Open Access
  • Published: 20 May 2020
  • Publisher: Amsterdam, ELSEVIER SCIENCE BV
  • Country: Switzerland
Abstract Competitive mechanisms contribute to image contrast from dislocations in annular dark-field scanning transmission electron microscopy (ADF-STEM). A clear theoretical understanding of the mechanisms underlying the ADF-STEM contrast is therefore essential for correct interpretation of dislocation images. This paper reports on a systematic study of the ADF-STEM contrast from dislocations in a GaN specimen, both experimentally and computationally. Systematic experimental ADF-STEM images of the edge-character dislocations reveal a number of characteristic contrast features that are shown to depend on both the angular detection range and specific position of ...
arXiv: Condensed Matter::Materials Science
free text keywords: Instrumentation, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Condensed Matter - Materials Science, Physics - Instrumentation and Detectors
Funded by
  • Funder: European Commission (EC)
  • Project Code: 766970
  • Funding stream: H2020 | RIA
FET H2020FET OPEN: FET-Open research and innovation actions
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