Search Results - person:"Hadjiagapiou, I.A."

The random field Ising model with an asymmetric trimodal probability distribution

Hadjiagapiou, I.A. - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 12, pp. 2229-2239

The Ising model in the presence of a random field is investigated within the mean field approximation based on Landau expansion. The random field is drawn from the trimodal probability distribution P(hi)=pδ(hi−h0)+qδ(hi+h0)+rδ(hi), where the probabilities p,q,r take on values within the...

Persistent link: https://www.econbiz.de/10011059759

The random-field Ising model with asymmetric bimodal probability distribution

Hadjiagapiou, I.A. - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 19, pp. 3945-3955

The Ising model, in the presence of a random field, is investigated within the mean-field approximation based on Landau expansion. The random field is drawn from the bimodal probability distribution P(h)=pδ(h−h0)+(1−p)δ(h+h0), where the probability p assumes any value within the interval...

Persistent link: https://www.econbiz.de/10011063301

Uncovering the secrets of the 2D random-bond Blume–Capel model

Malakis, A.; Berker, A. Nihat; Hadjiagapiou, I.A.; … - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 15, pp. 2930-2933

The effects of bond randomness on the ground-state structure, phase diagram and critical behavior of the square lattice ferromagnetic Blume–Capel (BC) model are discussed. The calculation of ground states at strong disorder and large values of the crystal field is carried out by mapping the...

Persistent link: https://www.econbiz.de/10010588963

Monte Carlo analysis of critical properties of the two-dimensional randomly site-diluted Ising model via Wang–Landau algorithm

Hadjiagapiou, I.A.; Malakis, A.; Martinos, S.S. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 10, pp. 2256-2266

The influence of random site dilution on the critical properties of the two-dimensional Ising model on a square lattice was explored by Monte Carlo simulations with the Wang–Landau sampling. The lattice linear size was L=20–120 and the concentration of diluted sites q=0.1,0.2,0.3. Its pure...

Persistent link: https://www.econbiz.de/10011063327

Finite-size scaling of the three-dimensional conserved-order-parameter Ising model via Wang–Landau algorithm

Hadjiagapiou, I.A.; Malakis, A.; Martinos, S.S. - In: Physica A: Statistical Mechanics and its Applications 373 (2007) C, pp. 376-386

The critical properties of the conserved-order-parameter (COP) version of the three-dimensional Ising model with zero magnetization were investigated by means of the Monte Carlo (MC) Wang–Landau algorithm. The study was carried out in appropriate restricted but dominant energy subspaces. The...

Persistent link: https://www.econbiz.de/10010591772

Short-time scaling via Monte Carlo single spin-flip algorithms for the Baxter–Wu model

Hadjiagapiou, I.A.; Malakis, A.; Martinos, S.S. - In: Physica A: Statistical Mechanics and its Applications 356 (2005) 2, pp. 563-574

The short-time critical dynamics of the Baxter–Wu model is investigated via Monte Carlo simulations using single spin-flip algorithms. The critical dynamic exponents z and θ are estimated and it is shown that the N-fold way provides a reliable estimate for the ratio of the static exponents...

Persistent link: https://www.econbiz.de/10011063023

Short-time critical dynamics of the Ising model studied within the N-fold algorithm

Malakis, A.; Martinos, S.S.; Hadjiagapiou, I.A. - In: Physica A: Statistical Mechanics and its Applications 327 (2003) 3, pp. 349-356

The short-time behaviour of the critical two-dimensional Ising model is studied for the Bortz–Kalos–Lebowitz N-fold way algorithm (BKL algorithm). For square lattices of linear sizes L=110,128,140,170, and 200, we calculate the short-time critical behaviour for the BKL algorithm and also for...

Persistent link: https://www.econbiz.de/10010591498