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Critical behaviour of thin films with quenched impurities

Craco, L.; Cesare, L. De; Rabuffo, I.; Takov, I.P.; … - In: Physica A: Statistical Mechanics and its Applications 270 (1999) 3, pp. 486-513

The critical behaviour of thin films containing quenched random impurities and inhomogeneities is investigated by the renormalization-group method to the one-loop order within the framework of the n-component φ4-model. The finite-size crossover in impure films has been considered on the basis...

Persistent link: https://www.econbiz.de/10011063765

How to discriminate easily between directed-percolation and Manna scaling

Bonachela, Juan A.; Muñoz, Miguel A. - In: Physica A: Statistical Mechanics and its Applications 384 (2007) 1, pp. 89-93

Here we compare critical properties of systems in the directed-percolation (DP) universality class with those of absorbing-state phase transitions occurring in the presence of a non-diffusive conserved field, i.e., transitions in the so-called Manna or C-DP class. Even if it is clearly...

Persistent link: https://www.econbiz.de/10011063842

Modified scaling relation for the random-field Ising model

Nowak, U.; Usadel, K.D.; Esser, J. - In: Physica A: Statistical Mechanics and its Applications 250 (1998) 1, pp. 1-7

We investigate the low-temperature critical behavior of the three-dimensional random-field Ising ferromagnet. By a scaling analysis we find that in the limit of temperature T→0 the usual scaling relations have to be modified as far as the exponent α of the specific heat is concerned. At zero...

Persistent link: https://www.econbiz.de/10011064370

Repulsive and attractive critical Casimir forces

Rafaï, Salima; Bonn, Daniel; Meunier, Jacques - In: Physica A: Statistical Mechanics and its Applications 386 (2007) 1, pp. 31-35

When confining vacuum fluctuations between two identical walls, the Casimir force manifests itself as a mutual … attraction of the walls. When confining concentration fluctuations of a binary liquid mixture, an analogous force should exist … entropic force can be either attractive or repulsive, depending on the boundary conditions for the fluctuations. For …

Persistent link: https://www.econbiz.de/10011064450

An alternative order parameter for the 4-state potts model

Fernandes, H.A.; Arashiro, E.; Drugowich de Felício, J.R. - In: Physica A: Statistical Mechanics and its Applications 366 (2006) C, pp. 255-264

We have investigated the dynamic critical behavior of the two-dimensional 4-state Potts model using an alternative order parameter first used by Vanderzande [J. Phys. A 20 (1987) L549] in the study of the Z(5) model. We have estimated the global persistence exponent θg by following the time...

Persistent link: https://www.econbiz.de/10011064472

“Wetting” phase transitions in type-I superconductors

Indekeu, J.O.; van Leeuwen, J.M.J. - In: Physica A: Statistical Mechanics and its Applications 236 (1997) 1, pp. 114-122

We predict on the basis of the Ginzburg-Landau theory that a type-I superconductor can exhibit an interface delocalization or “wetting” transition, in which a macroscopically thick superconducting layer intrudes from the surface into the bulk normal phase. The condition for this transition...

Persistent link: https://www.econbiz.de/10011064631

Renormalization Group Analysis of the Small-World Network Model

Newman, M. E. J.; Watts, D. J. - Santa Fe Institute - 1999

We study the small-world network model, which mimics the transition between regular-lattice and random-lattice behavior in social networks of increasing size. We contend that the model displays a normal continuous phase transition with a divergent correlation length as the degree of randomness...

Persistent link: https://www.econbiz.de/10005790708

Height Representation, Critical Exponents, and Ergodicity in the Four-State Triangular Potts Antiferromagnet

Moore, Cristopher; Newman, M. E. J. - Santa Fe Institute - 1999

model. We find that the exponents governing the spin--spin correlation function and spin fluctuations violate the Fisher …

Persistent link: https://www.econbiz.de/10005790960

Multifractal processes and self-organized criticality in the large-scale structure of the universe

Garrido, Pablo; Lovejoy, Shaun; Schertzer, Daniel - In: Physica A: Statistical Mechanics and its Applications 225 (1996) 3, pp. 294-311

with extreme fluctuations and first-order multifractal phase transitions. Since the presence of both of these phenomena is …

Persistent link: https://www.econbiz.de/10010586430

Spinodal decomposition in systems containing surfactant molecules

Mallamace, F.; Micali, N.; Chen, S.H. - In: Physica A: Statistical Mechanics and its Applications 236 (1997) 1, pp. 149-161

fluctuations. …

Persistent link: https://www.econbiz.de/10010586969