ON THE NONLINEAR SUSCEPTIBILITY OF THE QUANTUM ISING SPIN GLASS MODEL IN A RANDOM FIELD

1996 ◽  
Vol 10 (26) ◽  
pp. 1295-1300 ◽  
Author(s):  
G. BUSIELLO ◽  
R.V. SABUROVA
Keyword(s):  
Random Field ◽  
Spin Glass ◽  
Transverse Field ◽  
Nonlinear Susceptibility ◽  
Spin Glass Model ◽  
Ising Spin Glass ◽  
Ising Spin ◽  
Pairwise Interactions ◽  
Spin Glass Transition ◽  
Glass Model

We calculate the static bulk nonlinear susceptibility for Ising spin glass model with pairwise interactions, in a transverse field and longitudinal random field. Paramagnetic-spin glass transition is considered and connections with previous theoretical and experimental results are made.

Temperature Dependence of Spatial and Dynamic Heterogeneities above the Ising Spin Glass Transition

1996 ◽  
Vol 455 ◽  
Author(s):  
S. C. Glotzer ◽  
P. H. Poole ◽  
A. Coniglio ◽  
N. Jan
Keyword(s):  
Glass Transition ◽  
Temperature Dependence ◽  
Spin Glass ◽  
Large Scale ◽  
Spin Glass Model ◽  
Ising Spin Glass ◽  
Ising Spin ◽  
Spin Glass Transition ◽  
Glass Model ◽  
Equilibrium Distributions

ABSTRACTThe temperature dependence of the microstructure and local dynamics in the paramagnetic phase of the d = 2 and d = 3 ± J Ising spin glass model is examined by comparing the equilibrium distributions of local flip-rates and local energies calculated in large-scale Monte Carlo simulations. The emergence in this model of fast processes as the glass transition is approached corresponds with recent experimental results.

CLUSTERS AND FRACTALS IN THE ISING SPIN GLASS

Fractals ◽  
1995 ◽  
Vol 03 (03) ◽  
pp. 465-470 ◽  
Author(s):  
N. JAN ◽  
S.C. GLOTZER ◽  
P.H. POOLE ◽  
A. CONIGLIO
Keyword(s):  
Spin Glass ◽  
Universality Class ◽  
Percolation Model ◽  
Nonlinear Susceptibility ◽  
Spin Glass Model ◽  
Percolation Transition ◽  
Present Evidence ◽  
Ising Spin Glass ◽  
Ising Spin ◽  
Glass Model

We define clusters in the Ising ±J spin glass model, and present evidence for a percolation transition of these correlated clusters coincident with the thermodynamic transition. At the transition temperature Tsg, we search for the appropriate clusters of quasifrozen spins which will percolate with exponents in the Ising spin glass universality class. These clusters should provide the dominant contribution to the nonlinear susceptibility, which diverges at Tsg, and result from the interference of clusters of parallel and antiparallel spins, as predicted by the Frustrated Percolation model.

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