Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4922994
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Funding
- Austrian Science Fund (FWF) [J3397]
- Molecular Foundry, Lawrence Berkeley National Laboratory by U.S. Dept. of Energy [DE-AC02-05CH11231]
- Austrian Science Fund (FWF) [J3397] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [J 3397] Funding Source: researchfish
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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 mu m. 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. (C) 2015 AIP Publishing LLC.
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