Heteroepitaxial subsurface growth mode resulting in interlayer mixing

P. W. Murray, S. Thorshaug, I. Stensgaard, F. Besenbacher, E. Lægsgaard, A. V. Ruban, K. W. Jacobsen, G. Kopidakis, and H. L. Skriver
Phys. Rev. B 55, 1380 – Published 15 January 1997
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Abstract

A subsurface growth mode which results in interlayer mixing has been revealed from an interplay between scanning tunneling microscopy and ab initio total-energy calculations for the growth of Pd on Cu(110) and Ag(110) surfaces. On Cu(110), the Pd initially alloys into the surface layer forming ordered linear -Pd-Cu- chains. As the coverage is increased, the -Pd-Cu- chains remain at the same level, but become covered, partly by Cu atoms expelled during alloying, partly by substrate material supplied from steps and terraces. This results in a very rough surface morphology, even at relatively low Pd coverages. Similar structures were observed on Ag(110). The observed growth mode is expected to apply to other heteroepitaxial systems as well.

  • Received 27 September 1996

DOI:https://doi.org/10.1103/PhysRevB.55.1380

©1997 American Physical Society

Authors & Affiliations

P. W. Murray, S. Thorshaug, I. Stensgaard, F. Besenbacher, and E. Lægsgaard

  • Center for Atomic-Scale Materials Physics (CAMP) and Institute of Physics and Astronomy, University of Aarhus,

A. V. Ruban, K. W. Jacobsen, G. Kopidakis, and H. L. Skriver

  • Center for Atomic-Scale Materials Physics (CAMP), Department of Physics, Technical University of Denmark,

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Vol. 55, Iss. 3 — 15 January 1997

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