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Author Ozdol, V. B. ♦ Ercius, P. ♦ Ophus, C. ♦ Ciston, J. ♦ Gammer, C. ♦ Jin, X. G. ♦ Minor, A. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ACCURACY ♦ BEAMS ♦ CRYSTALS ♦ ELECTRON DIFFRACTION ♦ GALLIUM ARSENIDES ♦ MAPPING ♦ ORIENTATION ♦ RESOLUTION ♦ STRAINS ♦ TRANSMISSION ELECTRON MICROSCOPY
Abstract We report on the development of a nanometer scale strain mapping technique by means of scanning nano-beam electron diffraction. Only recently possible due to fast acquisition with a direct electron detector, this technique allows for strain mapping with a high precision of 0.1% at a lateral resolution of 1 nm for a large field of view reaching up to 1 μm. We demonstrate its application to a technologically relevant strain-engineered GaAs/GaAsP hetero-structure and show that the method can even be applied to highly defected regions with substantial changes in local crystal orientation. Strain maps derived from atomically resolved scanning transmission electron microscopy images were used to validate the accuracy, precision and resolution of this versatile technique.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-06-22
Publisher Place United States
Journal Applied Physics Letters
Volume Number 106
Issue Number 25


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