Phys. Rev. Lett. 67, 216–219 (1991)Direct observations of adatom–surface-atom replacement: Pt on Ni(110)Received 19 March 1991; published in the issue dated 8 July 1991 Field-ion-microscope observations provide direct evidence that Pt adatoms replace Ni(110) surface atoms at temperatures above 105 K. The directions of the individual displacements in this replacement process are consistent with a model involving concerted motion of the adatom and substrate atom. The activation barrier for the exchange is estimated to be 0.28 eV. © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.67.216
DOI:
10.1103/PhysRevLett.67.216
PACS:
61.16.Fk, 68.35.Fx, 79.70.+q
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