Minoda, H.; Yagi, K.; Meyer zu Heringdorf, Frank; Meier, A.; Kähler, D.; Horn-von Hoegen, Michael:
Gold-induced faceting on a Si(001) vicinal surface: SPA-LEED and REM study
In: Physical Review B : Condensed matter and materials physics, Jg. 59 (1999), Heft 3, S. 2363 - 2375
1999Artikel/Aufsatz in Zeitschrift
Physik (inkl. Astronomie)Fakultät für Physik » Experimentalphysik
Damit verbunden: 1 Publikation(en)
Titel:
Gold-induced faceting on a Si(001) vicinal surface: SPA-LEED and REM study
Autor*in:
Minoda, H.;Yagi, K.;Meyer zu Heringdorf, FrankUDE
LSF ID
48700
ORCID
0000-0002-5878-2012ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Meier, A.;Kähler, D.;Horn-von Hoegen, MichaelUDE
GND
1201039908
LSF ID
10366
ORCID
0000-0003-0324-3457ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
Erscheinungsjahr:
1999

Abstract:

Au-induced faceting on a 4° off Si(001) vicinal surface at temperatures between 750 and 880 °C was studied by in situ high-resolution low-energy electron diffraction and ultrahigh vacuum reflection electron microscopy. The formation of an Au-induced incommensurate 5×3.2 reconstruction on (001) terraces triggers the transformation of the initial regular step train of the vicinal surface into a “hill-and-valley” structure composed of very wide (001) terraces and step bands. With further increasing Au coverage the step bands transform to well-ordered (119) facets, which also exhibit the Au-induced reconstruction. For adsorption temperatures below 800 °C the transformation to the well-ordered (119) facet is kinetically hindered: an irregular mixture of (115), (117), and (119) facets is observed. The (001) terraces and facets are alternately arranged to form a hill-and-valley structure with an average period of ∼400 nm and terrace lengths of more than several hundreds of μm. Driving force for the large-scale morphological transformation into the hill-and-valley structure is the decrease of surface free energy of the (001) and the (119) surface due to the formation of Au-induced reconstruction on (119) facets as well as on (001) areas.