The Spatial Distribution of Threading Dislocations in Gallium Nitride Films

Moram, M A and Oliver, R A and Kappers, M and Humphreys, C J

Abstract.

Spatial analysis techniques are used to study threading dislocations (TDs) at the surfaces of a wide range of GaN films. In all films, the dislocation positions are consistent with a spatially random TD generation process followed by movement of dislocations, but are inconsistent with the spatial distribution of dislocations expected at island coalescence boundaries.

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Department of Materials
Imperial College London
Royal School of Mines
Exhibition Road
London, SW7 2AZ - UK