Low-temperature ultrafast mobility in systems with long-range repulsive interactions: Pb/Si(111)

TitleLow-temperature ultrafast mobility in systems with long-range repulsive interactions: Pb/Si(111)
Publication TypeJournal Article
Year of Publication2007
AuthorsYakes M, Hupalo M, Zaluska-Kotur MA, Gortel ZW, Tringides MC
Journal TitlePhysical Review Letters
Volume98
Pages135504
Date PublishedMar
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000245331500046
KeywordsCOMMENSURATE PHASES, graphite, LATTICES, ONE-DIMENSION, SURFACE-DIFFUSION, TRANSITIONS
Abstract

A realization of the numerous phases predicted in systems with long-range repulsive interactions was recently found in Pb/Si(111). Surprisingly, these numerous phases can be grown at low temperatures similar to 40 K over macroscopic distances. This unusual observation can be explained from theoretical calculations of the collective diffusion coefficient D-c in systems with long-range repulsive interactions. Instead of a gradual dependence of D-c on coverage, it was found that D-c has sharp maxima at low temperatures for every stable phase (i.e., for every rational value of the coverage theta=p/q) in agreement with the experiment.

DOI10.1103/PhysRevLett.98.135504
Alternate JournalPhys. Rev. Lett.