Abstract
A numerical analysis of the ripening of multilayer islands on Cu(111) shows that the Ehrlich-Schwoebel barrier for interlayer mass transport is independent of the terrace width w as long as w>wc=14 2 A, but vanishes for w<wc. The critical width wc corresponds exactly to the terrace width below which the surface state is pushed above the Fermi-level due to quantum confinement. The Ehrlich-Schwoebel barrier is therefore correlated with the occupation of surface states.
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