Nanodomains due to Phason Defects at a Quasicrystal Surface

TitleNanodomains due to Phason Defects at a Quasicrystal Surface
Publication TypeJournal Article
Year of Publication2011
AuthorsDuguet T, Unal B, Ledieu J, Dubois JM, Fournee V, Thiel PA
Journal TitlePhysical Review Letters
Volume106
Pages076101
Date Published02
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000287392300007
Abstract

Among the three coexisting types of terraces found on the twofold surface of the d-Al-Cu-Co quasicrystal, nanodomains are essentially observed on the transition-metal rich ones, with a coherent interface boundary. Both clean surface and Ag growth analyses, demonstrate that nanodomain surfaces are structurally identical to one of the two other terraces, which contains 85 at.% Al. We provide evidence that the nanodomains are a manifestation of phason defects that extend downward toward the bulk, and state that nanodomains develop because the energetic cost of creating the phason is outweighed by the change in surface energy. Consequently, the formation of nanodomains involves more than just the surface layer, but is driven by surface energetics.

URL<Go to ISI>://000287392300007http://prl.aps.org/pdf/PRL/v106/i7/e076101
DOI10.1103/PhysRevLett.106.076101
Alternate JournalPhys. Rev. Lett.