Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1554336 | Superlattices and Microstructures | 2009 | 7 Pages |
Abstract
We have recently measured for the first time-by using Reflectance Anisotropy spectroscopy- the optical gap between dangling-bond states on a single-domain diamond C(111)-2 Ã 1 surface. The experimental result we have obtained (1.47±0.02 eV ) represents the conclusion of the long-standing effort to determine if this surface is metallic or semiconducting. The large surface gap (even larger for possible excitonic effects) opens a new scientific question: at the moment neither state-of-the-art band calculations have succeeded in obtaining it, nor has its physical origin been explained.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
G. Bussetti, C. Goletti, A. Violante, P. Chiaradia, T. Derry,