Dynamic scattering theory for dark-field electron holography of 3D strain fields

Axel Lubk (1) , Elsa Javon (2, 3) , Nikolay Cherkashin (2) , Shay Reboh (4) , Christophe Gatel (2) , Martin Hÿtch (2)

1 TU Dresden - Technische Universität Dresden = Dresden University of Technology
2 CEMES - Centre d'élaboration de matériaux et d'études structurales
3 UA - University of Antwerp
4 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

Dark-field electron holography maps strain in crystal lattices into reconstructed phases over large fields of view. Here we investigate the details of the lattice strain–reconstructed phase relationship by applying dynamic scattering theory both analytically and numerically. We develop efficient analytic linear projection rules for 3D strain fields, facilitating a straight-forward calculation of reconstructed phases from 3D strained materials. They are used in the following to quantify the influence of various experimental parameters like strain magnitude, specimen thickness, excitation error and surface relaxation.

Domaines: Physique [physics]

Axel Lubk, Elsa Javon, Nikolay Cherkashin, Shay Reboh, Christophe Gatel, et al.. Dynamic scattering theory for dark-field electron holography of 3D strain fields. Ultramicroscopy, 2014, 136, pp.42-49. ⟨10.1016/j.ultramic.2013.07.007⟩. ⟨hal-01721153⟩