File:GaSb spiral growth.jpg
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English: A scanning tunneling microscopy image of the surface of a 4 um-thick GaSb film grown by molecular beam epitaxy on GaAs(001). The image, 0.5 um x 0.5 um, was acquired in situ following growth of the film. Spiral-like structures, such as the one seen here, grow around threading dislocations in the film caused by the 7% lattice mismatch with the substrate. Note the pair of dislocations emerging from the surface at the top of the spiral, along with a third emerging half-way down on the side; each one creates a 0.3 nm-height "step." In situ atomic-scale characterization is an important component in the development of growth procedures that minimize the dislocation density in heteroepitaxial layers. |
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| Source | http://www.nrl.navy.mil/techtransfer/Exhibits/science.html | ||||||
| Author | P.M. Thibado, B.R. Bennett, B.V. Shanabrook and L.J. Whitman | ||||||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:52, 28 September 2008 | | 360 × 354 (34 KB) | Pieter Kuiper | {{Information |Description={{en|1=A scanning tunneling microscopy image of the surface of a 4 um-thick GaSb film grown by molecular beam epitaxy on GaAs(001). The image, 0.5 um x 0.5 um, was acquired in situ following growth of the film. Spiral-like struc |
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