Journal
PHYSICAL REVIEW B
Volume 71, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.71.235303
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Here a general approach to measure quantitatively with atomic resolution the distribution of a chemical species in a host matrix is derived and applied to a case study consisting of a layer of Si buried in a GaAs matrix. Simulations and experiments performed on Si/GaAs superlattices demonstrate a quasilinear dependence of the high-angle annular dark-field image intensity on the concentration of Si in the GaAs matrix. The results have been compared with those obtained by cross-sectional scanning tunneling microscopy on the same specimens.
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