首页|The frustrated Ising model on the body-centered cubic lattice
The frustrated Ising model on the body-centered cubic lattice
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NSTL
Elsevier
We investigate phase transitions and thermodynamics of the Ising model with first neighbor (J1) and second-neighbor (J2) antiferromagetic (AF) interactions on the body centered cubic (bcc) lattice within a cluster mean-field approach. In this lattice, tuning g = J(2)/J(1) leads to a ground-state transition between AF and superantiferromagnetic (SAF) phases at the maximum of frustration g = 2/3. Although the ordering temperature is reduced as -> 2/3, our findings suggest the absence of strong frustration effects on the model, in good agreement with Monte Carlo simulations. We also find first-order phase transitions between AF and SAF phases at finite temperatures. Furthermore, the cluster mean-field outcomes support a scenario with only continuous phase transitions between the paramagnetic state and the low-temperature long-range orders. Therefore, our results indicate that frustration is unable to change the nature of the order-disorder phase transitions, which can be ascribed to the higher dimensionality of the bcc lattice.(C) 2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier
