Recently, the nucleation rate on top of a terrace during the irreversible growth of a crystal surface by molecular-beam epitaxy has been determined exactly. In this paper we go beyond the standard model usually employed to study the nucleation process, and we analyze the qualitative and quantitative consequences of two important additional physical ingredients: the nonuniformity of the Ehrlich-Schwoebel barrier at the step edge, because of the existence of kinks, and the steering effects, due to the interaction between the atoms of the flux and the substrate. We apply our results to typical experiments of second-layer nucleation.

Irreversible Nucleation in Molecular Beam Epitaxy: From Theory to Experiments

Paolo Politi;Claudio Castellano
2003

Abstract

Recently, the nucleation rate on top of a terrace during the irreversible growth of a crystal surface by molecular-beam epitaxy has been determined exactly. In this paper we go beyond the standard model usually employed to study the nucleation process, and we analyze the qualitative and quantitative consequences of two important additional physical ingredients: the nonuniformity of the Ehrlich-Schwoebel barrier at the step edge, because of the existence of kinks, and the steering effects, due to the interaction between the atoms of the flux and the substrate. We apply our results to typical experiments of second-layer nucleation.
2003
Istituto di Fisica Applicata - IFAC
INFM
File in questo prodotto:
File Dimensione Formato  
prod_22543-doc_65278.pdf

solo utenti autorizzati

Descrizione: Irreversible nucleation in molecular beam epitaxy: From theory to experiments
Tipologia: Versione Editoriale (PDF)
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 128.58 kB
Formato Adobe PDF
128.58 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/22366
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 13
social impact