Diffusion kinetics in the Pd/Cu(001) surface alloy

Authors
Grant, ML Swartzentruber, BS Bartelt, NC Hannon, JB
Citation
Ml. Grant et al., Diffusion kinetics in the Pd/Cu(001) surface alloy, PHYS REV L, 86(20), 2001, pp. 4588-4591
Citations number
20
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
20
Year of publication
2001
Pages
4588 - 4591
Database
ISI
SICI code
0031-9007(20010514)86:20<4588:DKITPS>2.0.ZU;2-T
Abstract
We use atom-tracking scanning tunneling microscopy to study the diffusion o f Pd in the Pd/Cu(001) surface alloy as a function of temperature. By follo wing the motion of individual Pd atoms incorporated in the surface, we show that Pd diffuses by a vacancy-exchange mechanism. We measure an activation energy for the diffusion of incorporated Pd atoms of 0.88 eV. which is in good agreement with our ab initio calculated energy of 0.94 eV.