Surface diffusion modes for Pt dimers and trimers on Pt(001)

Phys. Rev. Lett. 67, 622 – Published 29 July 1991
G. L. Kellogg and A. F. Voter

Abstract

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.

DOI: http://dx.doi.org/10.1103/PhysRevLett.67.622

  • Received 10 April 1991
  • Published in the issue dated 29 July 1991

© 1991 The American Physical Society

Authors & Affiliations

G. L. Kellogg and A. F. Voter

  • Sandia National Laboratories, Albuquerque, New Mexico 87185
  • Los Alamos National Laboratory, Los Alamos, New Mexico 87545

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