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Titolo:
PERIODIC STEP-BUNCHING ON A MISCUT PT(111) SURFACE
Autore:
YOON M; MOCHRIE SGJ; ZEHNER DM; WATSON GM; GIBBS D;
Indirizzi:
MIT,DEPT PHYS CAMBRIDGE MA 02139 OAK RIDGE NATL LAB,DIV SOLID STATE OAK RIDGE TN 37831 BROOKHAVEN NATL LAB,DEPT PHYS UPTON NY 11973
Titolo Testata:
Surface science
fascicolo: 1-3, volume: 338, anno: 1995,
pagine: 225 - 235
SICI:
0039-6028(1995)338:1-3<225:PSOAMP>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMMENSURATE-INCOMMENSURATE TRANSITION; BROMINE-INTERCALATED GRAPHITE; SYNCHROTRON X-RAY; VICINAL SI(111); PHASE-SEPARATION; RECONSTRUCTION; MORPHOLOGY; STRESS; GOLD;
Keywords:
PLATINUM; STEPPED SINGLE CRYSTAL SURFACES; SURFACE RELAXATION AND RECONSTRUCTION; SURFACE STRUCTURE; X-RAY SCATTERING, DIFFRACTION, AND REFLECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
M. Yoon et al., "PERIODIC STEP-BUNCHING ON A MISCUT PT(111) SURFACE", Surface science, 338(1-3), 1995, pp. 225-235

Abstract

The temperature dependence of the equilibrium surface morphology of astepped Pt(111) surface, miscut by 1.8 degrees towards [($) over bar 1 ($) over bar 12], has been studied by X-ray scattering techniques between 300 and 1900 K. Below T-c = 1389 K, the surface is found to be uniformly stepped and unreconstructed. Above T-c, the surface transforms into a periodic array of wide terraces and narrow terraces. Unlike macroscopic facets, the wide terraces are mesoscopic in extent, rangingfrom 230 Angstrom at 1389 K to 94 Angstrom at 1900 K. Reflectivity measurements suggest that multiple-height steps are not prevalent. The wave vector characterizing the array (delta) follows a power law versusreduced temperature [t = (T - T-c)/T-c]: delta = delta>(0)t(beta) with beta = 0.66 +/- 0.05.

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Documento generato il 20/09/20 alle ore 07:43:02