A CONTRIBUTION TO THE (1X2)REVERSIBLE-ARROW(1X1) ORDER-DISORDER TRANSITION OF FCC (110) NOBLE-METALS - COMPARISON BETWEEN MONTE-CARLO SIMULATIONS AND RHEED RESULTS FROM PT(110)

Autor(en): RATSCHKO, D
KORTE, U
MEYEREHMSEN, G
Stichwörter: Chemistry; Chemistry, Physical; DIFFRACTION; PART; Physics; Physics, Condensed Matter; STRUCTURAL TRANSITION; SURFACE
Erscheinungsdatum: 1994
Herausgeber: ELSEVIER SCIENCE BV
Journal: SURFACE SCIENCE
Volumen: 314
Ausgabe: 3
Startseite: L913-L918
Zusammenfassung: 
We present a Monte Carlo simulation of the (1 x 2) half arrow right over half arrow left (1 x 1) order-disorder transition for fcc (110) noble metals using the SOS model of Mazzeo et al. [Surface Science 273 (1992) 237]. We show that this model explains the experimental findings of recently published RHEED results from Pt(110). In particular, the shift of half order reconstruction peaks due to the roughening transition, which was found experimentally to increase with temperature and to decrease again at more elevated temperatures, can be explained in terms of steps with different (111) facet size. The initial step formation is dominated by excitations producing large (111) facets while at higher temperatures smaller facets are generated with increasing probability.
ISSN: 00396028
DOI: 10.1016/0039-6028(94)90227-5

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