Abstract
A detailed theoretical study of the electronic structure of transition metal nanotips is performed in the tight-binding scheme. The real space recursion method is used to determine the local densities of states (LDOS) of the nanotips. We consider more especially the W supported pyramidal tips and W pyramidal clusters with different morphologies. The apex LDOS of perfect supported tips are found to be quite different from those of surfaces and of clusters having the same morphology. The stability of the supported nanotips of different morphologies is also examined.
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