Phase Transitions in Disordered Systems: The Example of the Random-Field Ising Model in Four Dimensions

Fytas, N.G. ; Martín-Mayor, V. ; Picco, M. ; Sourlas, N.

Resumen: By performing a high-statistics simulation of the D=4 random-field Ising model at zero temperature for different shapes of the random-field distribution, we show that the model is ruled by a single universality class. We compute to a high accuracy the complete set of critical exponents for this class, including the correction-to-scaling exponent. Our results indicate that in four dimensions (i) dimensional reduction as predicted by the perturbative renormalization group does not hold and (ii) three independent critical exponents are needed to describe the transition.

Idioma: Inglés

DOI: 10.1103/PhysRevLett.116.227201

Año: 2016

Publicado en: Physical Review Letters 116, 22 (2016), 381132[5 pp]
ISSN: 0031-9007

Factor impacto JCR: 8.462 (2016)

Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 6 / 79 = 0.076 (2016) - Q1 - T1

Factor impacto SCIMAGO: 4.195 - Physics and Astronomy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2012-35719-C02-01

Tipo y forma: Article (Published version)