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Coverage-dependent self-organized ordering of Co- and Ti-silicide nanoislands along step-bunch edges of vicinal Si(111)
Tel Aviv University, Israel.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Tel Aviv University, Israel.
Tel Aviv University, Israel; Tel Aviv University, Israel.
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2011 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 83, no 16, 165409- p.Article in journal (Refereed) Published
Abstract [en]

We report on self-organized solid-phase epitaxially grown Ti- and Co-silicide nanoislands ordered along step-bunch edges of a vicinal Si(111) surface, as a function of the initial metal (Ti,Co) coverage. While the degree of self-ordering (in terms of step decoration) for Co-silicide islands was higher than for Ti-silicide islands, both types of island had an inverse dependence of the order parameter on coverage. In addition, the positions of the island sites were found to be correlated, and affected by the step-island and island-island interactions, leading to their alignment along the step-bunch less than 110 greater than directions, even for the terrace islands. Aberration-corrected high-resolution transmission electron microscopy was used to characterize the islands crystal structure and growth orientation. The above findings can be understood by the use of coarse-grain modeling.

Place, publisher, year, edition, pages
American Physical Society , 2011. Vol. 83, no 16, 165409- p.
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-118559DOI: 10.1103/PhysRevB.83.165409ISI: 000289351400006OAI: oai:DiVA.org:liu-118559DiVA: diva2:815505
Note

Funding Agencies|Israel Science Foundation [410/08]; Tel Aviv University Research Center for Nanoscience and Nanotechnology; Technion via the Israel Council for Higher Education; Russell Berrie Nanotechnology Institute at the Technion; Clore Foundation; Miller Institute for Basic Research in Science at UC Berkeley

Available from: 2015-06-01 Created: 2015-06-01 Last updated: 2015-06-10

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Garbrecht, Magnus
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Thin Film PhysicsFaculty of Science & Engineering
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