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Shape transition in very large germanium islands on Si(111)
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View: Figures


Image of FIG. 1.
FIG. 1.

AFM images and sections illustrating the morphologies of Ge islands. Prototypical islands with (a) hexagonal, (b) triangular, and (c) trillium shapes are shown, as well as ramified islands with (d) threefold and (e) triangular profiles. The number in the lower left corner of each image is the circularity ratio (see text) of the island or collection of islands. All islands were present on the same sample; the crystallographic direction specified in (a) applies to all images.

Image of FIG. 2.
FIG. 2.

Circularity ratio as a function of island area. The inset images show AFM topographs of the islands corresponding to individual data points. The images are presented at an identical scale, indicated by the scale bar in the largest image.

Image of FIG. 3.
FIG. 3.

XPEEM images [(a) and (b)] and absorption spectroscopy maps of the [(c) and (d)] Ge and [(e) and (f)] Si distributions in typical islands. The color scale in (c)–(f) has been scaled to each image individually in order to highlight the variation in concentration.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Shape transition in very large germanium islands on Si(111)