1984 Volume 53 Issue 2 Pages 696-701
Angle-resolved ultraviolet photoemission measurements have shown that the surface electronic structure of the Ge(111)7×7-Sn surface is essentially the same as that of the Si(111)7×7 surface. Metallic surface states of the Ge(111)7×7-Sn surface reveal a slight dispersion of an approximate 2×2 periodicity. The so-called dangling- and the back-bond surface states of the Ge(111)“2×8” surface also show a slight dispersion. The dangling- and the back-bond surface states of the Ge(111)7×7-Sn surface lie at nearly the same binding energies as those for the Ge(111)“2×8” surface rather than those for the Si(111)7×7 surface.
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