Phys. Rev. Lett. 67, 622–625 (1991)Surface diffusion modes for Pt dimers and trimers on Pt(001)Received 10 April 1991; published in the issue dated 29 July 1991 Field-ion-microscope observations and molecular statics calculations using embedded-atom-method potentials have identified the surface diffusion modes for Pt dimers and trimers on Pt(001). Dimers migrate by a series of displacements involving exchange between one of the dimer atoms and a substrate atom and have a lower activation barrier for diffusion than monomers. Trimer diffusion involves both exchange and hopping displacements and has an activation barrier comparable to monomers. © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.67.622
DOI:
10.1103/PhysRevLett.67.622
PACS:
61.16.Fk, 61.16.Fk, 66.30.Fq
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