Groupe de Physique Statistique/ Arbeitsgruppe Statistische Physik

Equipe 106, Institut Jean Lamour

                     
Startseite
Zugang
Mitarbeiter
Publikationen
Articles in peer-reviewed journals
Letters
Invited proceedings
Proceedings
Unpublished
Ph.D
Habilitation
Epistemology, history of sciences
Pedagogical papers
Buch
Book edition
Book chapters
Vulgarisation
Seminare
Ateliers
Rencontres
Schulen
International
Arbeitsgruppen
Stellen, Doktorarbeiten
Lehre

Articles in peer-reviewed journals

On the universality class of the 3d Ising model with long-range-correlated disorder
Ivaneyko D., Berche B., Holovatch Yu., Ilnytskyi J.
Physica A 387 (2008) 4497-4512
DOI : 10.1016/j.physa.2008.03.034
ArXiv : cond-mat/0611568 [PDF]

We analyze a controversial question about the universality class of the three-dimensional Ising model with long-range-correlated disorder. Whereas both analytical and numerical studies performed so far support an extended Harris criterion (A. Weinrib, B. I. Halperin, Phys. Rev. B 27 (1983) 413) and bring about the new universality class, the numerical values of the critical exponents found so far differ essentially. To resolve this discrepancy we perform extensive Monte Carlo simulations of a 3d Ising magnet with non-magnetic impurities arranged as lines with random orientation. We apply Wolff cluster algorithm accompanied by a histogram reweighting technique and make use of the finite-size scaling to extract the values of critical exponents governing the magnetic phase transition. Our estimates for the exponents differ from the results of the two numerical simulations performed so far and are in favour of a non-trivial dependency of the critical exponents on the peculiarities of long-range correlations decay.



Seitenanfang