Critical wetting in the two-dimensional Ising ferromagnet confined between inhomogeneous walls

We present a numerical study of the critical wetting behavior of an Ising magnet confined be- tween two walls, separated by a distance L, where short-range inhomogeneous surface magnetic fields act. So, samples are assumed to have a size L × M , L being the width and M the length, respec- tively. By...

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Autores principales: Trobo, Marta Liliana, Albano, Ezequiel Vicente
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Exactas
Física
Ising magnet
critical wetting behavior
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131337
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131337
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Ising magnet
critical wetting behavior
spellingShingle Ciencias Exactas
Física
Ising magnet
critical wetting behavior
Trobo, Marta Liliana
Albano, Ezequiel Vicente
Critical wetting in the two-dimensional Ising ferromagnet confined between inhomogeneous walls
topic_facet Ciencias Exactas
Física
Ising magnet
critical wetting behavior
description We present a numerical study of the critical wetting behavior of an Ising magnet confined be- tween two walls, separated by a distance L, where short-range inhomogeneous surface magnetic fields act. So, samples are assumed to have a size L × M , L being the width and M the length, respec- tively. By considering surface fields varying spatially with a given wavelength or period (λ), H1(x, λ) with 1 ≤ x ≤ M , we found that the wetting temperature is given by the exact result of Abraham [D.B. Abraham, Phys. Rev. Lett. 44, 1165 (1980)] provided that an effective field given by the spacial average value (Heff ≡ 1 λ R λ 0 H1(x, λ)dx > 0) is considered. The above results hold in the low wavelength regime, while for λ → ∞ and a bivaluated surface field (i.e., Hmax for x ≤ M/2, and δHmax for x > M/2, with 0 < δ < 1), one observes two almost independent wetting transitions, both being compatible with Abra- ham’s exact results corresponding to Hmax and δHmax, respectively. On the other hand, for H1(x, λ) 6 = 0 but Heff = 0 bulk standard critical behavior results is observed.
format Articulo
Articulo
author Trobo, Marta Liliana
Albano, Ezequiel Vicente
author_facet Trobo, Marta Liliana
Albano, Ezequiel Vicente
author_sort Trobo, Marta Liliana
title Critical wetting in the two-dimensional Ising ferromagnet confined between inhomogeneous walls
title_short Critical wetting in the two-dimensional Ising ferromagnet confined between inhomogeneous walls
title_full Critical wetting in the two-dimensional Ising ferromagnet confined between inhomogeneous walls
title_fullStr Critical wetting in the two-dimensional Ising ferromagnet confined between inhomogeneous walls
title_full_unstemmed Critical wetting in the two-dimensional Ising ferromagnet confined between inhomogeneous walls
title_sort critical wetting in the two-dimensional ising ferromagnet confined between inhomogeneous walls
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/131337
work_keys_str_mv AT trobomartaliliana criticalwettinginthetwodimensionalisingferromagnetconfinedbetweeninhomogeneouswalls
AT albanoezequielvicente criticalwettinginthetwodimensionalisingferromagnetconfinedbetweeninhomogeneouswalls
bdutipo_str Repositorios
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