Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

Activated dynamic scaling in the random-field Ising model : A nonperturbative functional renormalization group approach (CROSBI ID 218913)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Balog, Ivan ; Tarjus, Gilles Activated dynamic scaling in the random-field Ising model : A nonperturbative functional renormalization group approach // Physical review. B, Condensed matter and materials physics, 91 (2015), 214201-1-214201-8. doi: 10.1103/PhysRevB.91.214201

Podaci o odgovornosti

Balog, Ivan ; Tarjus, Gilles

engleski

Activated dynamic scaling in the random-field Ising model : A nonperturbative functional renormalization group approach

The random-field Ising model shows an extreme critical slowdown that has been described by activated dynamic scaling: The characteristic time of relaxation toward equilibrium diverges exponentially with the correlation length lnτ∼ξψ/T, with ψ an a priori unknown barrier exponent. Through a nonperturbative functional renormalization group, we show that for spatial dimensions d less than a critical value dDR≃5.1, also associated with dimensional-reduction breakdown, ψ=θ with θ the temperature exponent near the zero-temperature fixed point that controls the critical behavior. For d>dDR, on the other hand, ψ=θ−2λ, where θ=2 and λ>0 an additional exponent. At the upper critical dimension d=6, λ=1, so that ψ=0, and activated scaling gives way to conventional scaling. We give a physical interpretation of the results in terms of collective events in real space, avalanches, and droplets. We also propose a way to check the two regimes by computer simulations of long-range one-dimensional systems.

Critical phenomena; disordered systems; renormalization group

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

91

2015.

214201-1-214201-8

objavljeno

1098-0121

10.1103/PhysRevB.91.214201

Povezanost rada

Fizika

Poveznice
Indeksiranost