Equilibrium properties of an axial next-nearest-neighbor Ising model in two dimensions

1999 ◽  
Vol 60 (14) ◽  
pp. 10316-10324 ◽  
Author(s):  
A. Sato ◽  
F. Matsubara
1997 ◽  
Vol 11 (13) ◽  
pp. 565-570
Author(s):  
G. L. S. Paula ◽  
W. Figueiredo

We have applied the Glauber and Metropolis prescriptions to investigate the stationary states of the Ising model in one and two dimensions. We have employed the formalism of the master equation to follow the evolution of the system towards the stationary states. Although the Glauber and Metropolis transition rates lead the system to the same equilibrium states for the Ising model in the Monte Carlo simulations, we show that they can predict different results if we disregard the correlations between spins. The critical temperature of the one-dimensional Ising model cannot even be found by using the Metropolis algorithm and the mean field approximation. However, taking into account only correlations between nearest neighbor spins, the resulting stationary states become identical for both Glauber and Metropolis transition rates.


2017 ◽  
Vol 95 (17) ◽  
Author(s):  
Fumitaka Matsubara ◽  
Takayuki Shirakura ◽  
Nobuo Suzuki

2000 ◽  
Vol 14 (20) ◽  
pp. 749-758 ◽  
Author(s):  
BEATRIZ BOECHAT ◽  
R. FILGUEIRAS ◽  
L. MARINS ◽  
CLAUDETTE CORDEIRO ◽  
N. S. BRANCO

We investigate the mixed-spin (spin-1/2 and spin-1) antiferromagnetic Ising model in two dimensions through a real-space renormalization group transformation. The model includes nearest and next-nearest neighbor interactions and is suitable to describe ferrimagnetic ordering. We present the finite-temperature phase diagram of the model. The presence of the second-neighbor bonds enlarge the ferrimagnetic phase. Our results do not indicate the existence of a tricritical point, contrary to previous effective-field calculations.


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