Critical phenomena at perfect and non-perfect surfaces

Details Critical phenomena at perfect and non-perfect surfaces Critical phenomena at perfect and non-perfect surfaces

1997-10-10

arxiv.org/abs/cond-mat/9710097v1

Eur. Phys. J. B 1, 385 (1998)

Physics

Condensed Matter

7 pages, 13 figures, submitted to European Physical Journal B

Scientific paper

10.1007/s100510050198

The effect of imperfections on surface critical properties is studied for Ising models with nearest-neighbour ferromagnetic couplings on simple cubic lattices. In particular, results of Monte Carlo simulations for flat, perfect surfaces are compared to those for flat surfaces with random, 'weak' or 'strong', interactions between neighbouring spins in the surface layer, and for surfaces with steps of monoatomic height. Surface critical exponents at the ordinary transition, in particular $\beta_1 = 0.80 \pm 0.01$, are found to be robust against these perturbations.

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