Statistical correction of atom probe tomography data of semiconductor alloys combined with optical spectroscopy: The case of Al0.25Ga0.75N

Abstract : The ternary semiconductor alloy Al0.25Ga0.75N has been analyzed by means of correlated photoluminescence spectroscopy and atom probe tomography (APT). We find that the composition measured by APT is strongly dependent on the surfaceelectric field, leading to erroneous measurements of the alloy composition at high field, due to the different evaporation behaviors of Al and Ga atoms. After showing how a biased measurement of the alloy content leads to inaccurate predictions on the optical properties of the material, we develop a correction procedure which yields consistent transition and localization energies for the alloy photoluminescence.
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https://hal.archives-ouvertes.fr/hal-01928851
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Submitted on : Tuesday, November 20, 2018 - 6:15:44 PM
Last modification on : Friday, September 27, 2019 - 12:36:10 PM

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L. Rigutti, L. Mancini, D. Hernández-Maldonado, W. Lefebvre, E. Giraud, et al.. Statistical correction of atom probe tomography data of semiconductor alloys combined with optical spectroscopy: The case of Al0.25Ga0.75N. Journal of Applied Physics, American Institute of Physics, 2016, 119 (10), pp.105704. ⟨10.1063/1.4943612⟩. ⟨hal-01928851⟩

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