http://www.cnr.it/ontology/cnr/individuo/prodotto/ID240549

Surface diffusion of Au on Si(111): A microscopic study (Articolo in rivista)

Type

Label

Surface diffusion of Au on Si(111): A microscopic study (Articolo in rivista) (literal)

Anno

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

Alternative label

Slezak, J (Slezak, J); Ondrejcek, M (Ondrejcek, M); Chvoj, Z (Chvoj, Z); Chab, V (Chab, V); Conrad, H (Conrad, H); Heun, S (Heun, S); Schmidt, T (Schmidt, T); Ressel, B (Ressel, B); Prince, KC (Prince, KC) (2000)
Surface diffusion of Au on Si(111): A microscopic study
in Physical review. B, Condensed matter
(literal)

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

Slezak, J (Slezak, J); Ondrejcek, M (Ondrejcek, M); Chvoj, Z (Chvoj, Z); Chab, V (Chab, V); Conrad, H (Conrad, H); Heun, S (Heun, S); Schmidt, T (Schmidt, T); Ressel, B (Ressel, B); Prince, KC (Prince, KC) (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 ] Acad Sci Czech Republ, Inst Phys, Prague 16253, Czech Republic [ 2 ] Fritz Haber Inst, D-14195 Berlin, Germany [ 3 ] Sincrotrone Trieste, I-34012 Trieste, Italy (literal)

Titolo

Abstract

The direct evolution of submonolayer two-dimensional Au phases on the Si(111)-(7 x 7) surface was studied in real time using the spectroscopic photoemission and low energy electron microscope located at the synchrotron radiation source ELETTRA. A finite area covered by 1 monolayer (ML) of gold with a steplike transition zone was prepared by evaporation in situ. Subsequent annealing resulted in the spread of the An layer and the formation of laterally extended Si(111)-(5 x 1)-Au and Si(111)-(root 3 x root 3)R30 degrees-Au surface reconstructions. At a temperature around 970 K, the boundary of the gold-covered region propagates on the dean Si(111)-(7 x 7) and exhibits a nonlinear dependence on time. The ordered Si(111)-(5 x 1)-Au plateau develops a separated front moving with constant velocity. Two values of the Au diffusion coefficients were estimated at a temperature of about 985 K: (1) D-7 x 7 = 5.2 x 10(-8) cm(2) s(-1) as the average diffusion coefficient for Au on a clean Si(111)-(7 x 7) surface in the concentration range from 0.4 ML up to 0.66 ML and (2) D-5 x 1 = 1.2 x 10(-7) cm(2) s(-1) as the lower limit for the diffusion of single Au atoms on the Si(111)-(5 x 1)-Au ordered phase. (literal)

Prodotto di