Ising films with surface defects

Details Ising films with surface defects Ising films with surface defects

2000-07-31

arxiv.org/abs/cond-mat/0007499v1

Eur. Phys. J. B 18, 655-661 (2000)

Physics

Condensed Matter

8 pages, 12 figures included, submitted to European Physical Journal B

Scientific paper

10.1007/s100510070014

The influence of surface defects on the critical properties of magnetic films is studied for Ising models with nearest-neighbour ferromagnetic couplings. The defects include one or two adjacent lines of additional atoms and a step on the surface. For the calculations, both density-matrix renormalization group and Monte Carlo techniques are used. By changing the local couplings at the defects and the film thickness, non-universal features as well as interesting crossover phenomena in the magnetic exponents are observed.

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