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Surface statistics in ASOS, RSOS and BCSOS roughening models
A104 48
Surface Science 211/212 (1989) 48 54 North-Holland. Amsterdam
S U R F A C E S T A T I S T I C S IN A S O S , R S O S A N D B C S O S R O U G H E N I N G MODELS R. S P A D A C I N I and G.E. T O M M E I Dtpartimento dt Fisica dell'Uni~,erstu) and G N S M / ( ' I S M , Via Dodecaneso 33, l¢H4¢3 Gem)ca, Itah' Received 24 June 1988; accepted for publication 25 October 1988 The local height distribution is studied by a low temperature expansion for different versions of the SOS picture of a smooth surface; the exact Gaussian solution for the BCSOS model does not hold in the ASOS and RSOS pictures, in particular the ASOS distribution seems to be far from Gaussian behaviour. In the Gaussian limit (BCSOS), the asymptotic value of the characteristic function is evaluated exactly with and without screening effects and a rapidly convergent expansion near T R is obtained, showing that the usual Gaussian approximation holds only at high temperatures and far from destructive interference conditions. The critical behaviour of some fundamental quantities is studied.
Surface Science 211/212 (198% 55 ~+t} North-Holland, Amsterdam
5"~
S T R U C T U R E A N D C O R R E L A T I O N S OF A L I Q U I D METAl, SURFACE: G O L D S. IARLORI, P. C A R N E V A L t I B M European Center for Scientific and Engineering Computing. Via Giorgione 1.59, 00147 Rome, ltalv
F. ERCOLESSI and E. TOSATTI International School ]?)r Ad~:am ed Studws. Strada ('ostwra 11, 34014 I)'ws'te+ ltah' Received 28 June 1988: accepted for publication 7 September 1988 We have studied the static properties (surface tension, density profile, structurc and correlations) of a model liquid metal surface. Classical molecular dynamics has been used, m conjunction with a many-body force scheme (the "'glue" model) optimized to describe gold. A general tendency of this liquid surface to be more short-range ordered than the bulk is found, and characterized in detail.
Surface Science 211/212 (1989) 48 54 North-Holland. Amsterdam
S U R F A C E S T A T I S T I C S IN A S O S , R S O S A N D B C S O S R O U G H E N I N G MODELS R. S P A D A C I N I and G.E. T O M M E I Dtpartimento dt Fisica dell'Uni~,erstu) and G N S M / ( ' I S M , Via Dodecaneso 33, l¢H4¢3 Gem)ca, Itah' Received 24 June 1988; accepted for publication 25 October 1988 The local height distribution is studied by a low temperature expansion for different versions of the SOS picture of a smooth surface; the exact Gaussian solution for the BCSOS model does not hold in the ASOS and RSOS pictures, in particular the ASOS distribution seems to be far from Gaussian behaviour. In the Gaussian limit (BCSOS), the asymptotic value of the characteristic function is evaluated exactly with and without screening effects and a rapidly convergent expansion near T R is obtained, showing that the usual Gaussian approximation holds only at high temperatures and far from destructive interference conditions. The critical behaviour of some fundamental quantities is studied.
Surface Science 211/212 (198% 55 ~+t} North-Holland, Amsterdam
5"~
S T R U C T U R E A N D C O R R E L A T I O N S OF A L I Q U I D METAl, SURFACE: G O L D S. IARLORI, P. C A R N E V A L t I B M European Center for Scientific and Engineering Computing. Via Giorgione 1.59, 00147 Rome, ltalv
F. ERCOLESSI and E. TOSATTI International School ]?)r Ad~:am ed Studws. Strada ('ostwra 11, 34014 I)'ws'te+ ltah' Received 28 June 1988: accepted for publication 7 September 1988 We have studied the static properties (surface tension, density profile, structurc and correlations) of a model liquid metal surface. Classical molecular dynamics has been used, m conjunction with a many-body force scheme (the "'glue" model) optimized to describe gold. A general tendency of this liquid surface to be more short-range ordered than the bulk is found, and characterized in detail.