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Article: Scientists at University of Manchester describe research in condensed matter.
- Article from:
- Physics Week
- Article date:
- November 10, 2009
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According to recent research from Manchester, the United Kingdom, "Following on from the idea that clusters of vacancies are the origin of the featureless absorption and brown colouration in natural diamond, dislocations are shown to exhibit sub-bandgap absorption also. The vacancy cluster idea has arisen from theoretical predictions of pi-bonded chains reconstructing the cluster surfaces and has been confirmed by energy loss studies."
"In contrast, bandgap states at dislocations are observed in brown and colourless diamonds alike, giving rise to weak absorption, which resembles that theoretically predicted from shuffle dislocation segments. This, however, would ...