Critical properties of a two-dimensional Ising magnet with quasiperiodic interactions.

摘要: We address the study of quasiperiodic interactions on a square lattice by using an Ising model with ferromagnetic and antiferromagnetic exchange following Fibonacci sequence in both directions lattice. applied Monte Carlo method, together Metropolis algorithm, to calculate thermodynamic quantities system. obtained Edwards-Anderson order parameter q_{EA}, magnetic susceptibility χ, specific heat c characterize universality class phase transition. also use finite size scaling method obtain critical temperature system exponents β,γ, ν. In low-temperature limit we spin-glass around T_{c}≈2.274, ν, indicating that induces change Also, discovered ordering two-dimensional which is rare and, as far know, unique example under-frustrated model.