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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 1 Issue 3 (1998) pp 385-391
Critical phenomena at perfect and non-perfect surfaces
M. Pleimling (a), W. Selke (b)
Institut für Theoretische Physik, Technische Hochschule, 52056 Aachen, Germany
Received: 7 October 1997 / Accepted: 19 November 1997
Abstract: 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.
PACS. 05.50.+q Lattice theory and statistics; Ising problems - 68.35.Rh Phase transitions and critical phenomena - 75.30.Pd Surface magnetism
(a) email: pleim@physik.rwth-aachen.de
(b) email: selke@physik.rwth-aachen.de
Online publication: February 24, 1998
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