Strain relaxation in small adsorbate islands: O on W(110) (Articolo in rivista)

Type
Label
  • Strain relaxation in small adsorbate islands: O on W(110) (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Mentes, TO; Stojic, N; Binggeli, N; Nino, MA; Locatelli, A; Aballe, L; Kiskinova, M; Bauer, E (2008)
    Strain relaxation in small adsorbate islands: O on W(110)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mentes, TO; Stojic, N; Binggeli, N; Nino, MA; Locatelli, A; Aballe, L; Kiskinova, M; Bauer, E (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 77 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Mentes, T. O.; Nino, M. A.; Locatelli, A.; Kiskinova, M.] Sincrotrone Trieste SCpA, I-34012 Basovizza Trieste, Italy; [Stojic, N.] SISSA, I-34014 Trieste, Italy; [Stojic, N.; Binggeli, N.] INFM CNR Democritos, Theory Elettra Grp, I-34014 Trieste, Italy; [Binggeli, N.] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy; [Aballe, L.] Univ Autonoma Barcelona, CELLS ALBA Synchroton Light Facil, E-08193 Barcelona, Spain; [Bauer, E.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA (literal)
Titolo
  • Strain relaxation in small adsorbate islands: O on W(110) (literal)
Abstract
  • The stress-induced lattice changes in a p(1x2) ordered oxygen layer on W(110) are measured by low-energy electron diffraction. We have observed that small oxygen islands show mismatch with the underlying lattice. Our results indicate that along [1 (1) over bar0], the average mismatch inversely scales with the island size as 1/L for all oxygen coverages up to 0.5 ML, while along [001], it is significant only for the smallest oxygen islands and scales as a higher power of the inverse island size. The behavior along [1 (1) over bar0] is described by a one-dimensional finite-size Frenkel-Kontorova model. By using this model, together with the calculated force constants, we make a quantitative estimate of the change in surface stress upon oxygen adsorption. The result is consistent with our ab initio calculations, which give a relative compressive stress of -4.72 N/m along [1 (1) over bar0] and a minute relative tensile stress of 0.15 N/m along [001]. The scaling along [001] is qualitatively explained as an effect induced by the lattice relaxation in the [1 (1) over bar0] direction. (literal)
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