http://www.cnr.it/ontology/cnr/individuo/prodotto/ID240514

Local Au coverage as driving force for Au induced faceting of vicinal Si(001): a LEEM and XPEEM study (Articolo in rivista)

Type

Label

Local Au coverage as driving force for Au induced faceting of vicinal Si(001): a LEEM and XPEEM study (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Heringdorf, FJMZ (Heringdorf, FJMZ); Hild, R (Hild, R); Zahl, P (Zahl, P); Schmidt, T (Schmidt, T); Ressel, B (Ressel, B); Heun, S (Heun, S); Bauer, E (Bauer, E); Horn-von Hoegen, M (Horn-von Hoegen, M) (2001)
Local Au coverage as driving force for Au induced faceting of vicinal Si(001): a LEEM and XPEEM study
in Surface science
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Heringdorf, FJMZ (Heringdorf, FJMZ); Hild, R (Hild, R); Zahl, P (Zahl, P); Schmidt, T (Schmidt, T); Ressel, B (Ressel, B); Heun, S (Heun, S); Bauer, E (Bauer, E); Horn-von Hoegen, M (Horn-von Hoegen, M) (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

[ 1 ] Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany [ 2 ] Sincrotrone Trieste, ELETTRA, I-34012 Basovizza, TS, Italy [ 3 ] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA (literal)

Titolo

Local Au coverage as driving force for Au induced faceting of vicinal Si(001): a LEEM and XPEEM study (literal)

Abstract

Adsorption of Au at 850 degreesC on a regular stepped 4 degrees vicinal Si(0 0 1) surface results in a dramatic change of the step morphology: the surface decomposes into areas which are perfectly flat with a (0 0 1) orientation and (1 1 9) facets. Low energy electron microscopy shows the dynamics of the faceting process in real space while X-ray photoemission electron microscopy (XPEEM) allows a spatially resolved determination of the Au coverage at different stages of the faceting process. At a critical Au coverage of approximate to1/3 ML (0 0 1) terraces are formed which extend anisotropically along the step edges of the surface. The steps in between the terraces bunch and form step bands in order to conserve the macroscopic miscut of the sample. Driving force for this morphological transformation is a complex (5 x 3.2) reconstruction formed on the (0 0 1) terraces. XPEEM shows this phase separation also for the Au coverage: on the (001)terraces the Au coverage is up to 40% higher compared to the step bands. With further increasing Au coverage the width of the Au rich terraces increases while the step bands become steeper. In a second step Au adsorbs on the step bands transforming them into well defined and smooth (1 1 9) facets. (literal)

Prodotto di