physica status solidi (a) · 1995 · 50 citations · 13 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsElectronic MaterialsNanotechnologyElectron MicroscopyNanoscale MaterialsNanostructured Electronic MaterialsQuantum DotsSemiconductor PhysicsTransmission Electron MicroscopyDiffraction ContrastDiffraction Contrast In Electron MicroscopyHigh-resolution Electron MicroscopyHigh-resolution Transmission Electron MicroscopyMicroscopy ImagingQuantum Dot MaterialsQuantum WiresSemiconductor Quantum Dots
The electron microscope determination (high resolution HREM and conventional diffraction contrast TEM) of the structure (geometry, size, shape, etc.) of nm-scale objects is of great interest for the creation of novel semiconducting materials of reduced dimensions as, e.g., quantum dots (QDs) and quantum wires. HREM contrast simulations based on molecular dynamics structure modelling are applied to check the visualization of coherently strained nm-scale InAs islands embedded in a GaAs matrix. Being of pyramidal shape, InAs islands always seem to be truncated owing to lower In content on top of the pyramid and to the high level of strains around the island. Optimum imaging conditions are analysed to reveal shape and size of such objects.
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Self-organized growth of regular nanometer-scale InAs dots on GaAs
J. M. Moison, F. Houzay, F. Barthe et al. · Applied Physics Letters · 1994 · 928 citations