Cu-Ag (111) polymorphism induced by segregation and advacancies.
Chemical and structural phase transitions induced by Ag surface segregation in the dilute Cu(Ag) (111) system have been investigated by Monte Carlo simulations. The polymorphism observed when depositing Ag on Cu (111) is proven to exist also in equilibrium segregation. If the segregation isotherms are not very sensitive to the superstructures, we show that the superstructure observed in the high part of the isotherm depends strongly on the number of advacancies.
Tétot
Robert
R
LEMHE, UMR 8647 CNRS, Université Paris-Sud, F91405 Orsay CEDEX, France. robert.tetot@lemhe.u-psud.fr
Berthier
Fabienne
F
Creuze
Jérôme
J
Meunier
Isabelle
I
Tréglia
Guy
G
Legrand
Bernard
B