Collective surface diffusion on a triangular lattice in presence of ordered phases

A. Danani; R. Ferrando; E. Scalas; M. Torri

doi:10.1016/S0039-6028(97)01009-1

Collective surface diffusion on a triangular lattice in presence of ordered phases

A. Danani, R. Ferrando, E. Scalas, M. Torri

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

Diffusion is studied in a two-dimensional gas of triangular symmetry with repulsive interactions. The collective diffusion coefficient, D_c, is calculated as the ratio of the average jump rate and the zero-wave-vector static structure factor (Darken approximation). The dependence of D_c on coverage, θ, is studied in both the disordered and ordered regions of the phase diagram. It is shown that, around the coverages of the perfect ordered phases (θ = 1/3 and 2/3), D_c changes of orders of magnitude in tiny θ ranges.

Lingua originale	Inglese
pagine (da-a)	281-285
Numero di pagine	5
Rivista	Surface Science
Volume	402-404
DOI	https://doi.org/10.1016/S0039-6028(97)01009-1
Stato di pubblicazione	Pubblicato - 15 mag 1998
Pubblicato esternamente	Sì

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title = "Collective surface diffusion on a triangular lattice in presence of ordered phases",

abstract = "Diffusion is studied in a two-dimensional gas of triangular symmetry with repulsive interactions. The collective diffusion coefficient, Dc, is calculated as the ratio of the average jump rate and the zero-wave-vector static structure factor (Darken approximation). The dependence of Dc on coverage, θ, is studied in both the disordered and ordered regions of the phase diagram. It is shown that, around the coverages of the perfect ordered phases (θ = 1/3 and 2/3), Dc changes of orders of magnitude in tiny θ ranges.",

keywords = "Chemical diffusion, Lattice gas models, Ordered phases",

author = "A. Danani and R. Ferrando and E. Scalas and M. Torri",

year = "1998",

month = may,

day = "15",

doi = "10.1016/S0039-6028(97)01009-1",

language = "English",

volume = "402-404",

pages = "281--285",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Collective surface diffusion on a triangular lattice in presence of ordered phases

AU - Danani, A.

AU - Ferrando, R.

AU - Scalas, E.

AU - Torri, M.

PY - 1998/5/15

Y1 - 1998/5/15

N2 - Diffusion is studied in a two-dimensional gas of triangular symmetry with repulsive interactions. The collective diffusion coefficient, Dc, is calculated as the ratio of the average jump rate and the zero-wave-vector static structure factor (Darken approximation). The dependence of Dc on coverage, θ, is studied in both the disordered and ordered regions of the phase diagram. It is shown that, around the coverages of the perfect ordered phases (θ = 1/3 and 2/3), Dc changes of orders of magnitude in tiny θ ranges.

AB - Diffusion is studied in a two-dimensional gas of triangular symmetry with repulsive interactions. The collective diffusion coefficient, Dc, is calculated as the ratio of the average jump rate and the zero-wave-vector static structure factor (Darken approximation). The dependence of Dc on coverage, θ, is studied in both the disordered and ordered regions of the phase diagram. It is shown that, around the coverages of the perfect ordered phases (θ = 1/3 and 2/3), Dc changes of orders of magnitude in tiny θ ranges.

KW - Chemical diffusion

KW - Lattice gas models

KW - Ordered phases

UR - http://www.scopus.com/inward/record.url?scp=0031635115&partnerID=8YFLogxK

U2 - 10.1016/S0039-6028(97)01009-1

DO - 10.1016/S0039-6028(97)01009-1

M3 - Article

SN - 0039-6028

VL - 402-404

SP - 281

EP - 285

JO - Surface Science

JF - Surface Science

ER -

Collective surface diffusion on a triangular lattice in presence of ordered phases

Abstract

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