Abstract
We use Monte Carlo (MC) methods to simulate a two-dimensional (2D) bond-diluted Ising model on the square lattice, which has frustration between nearest-neighbor interaction and next-nearest-neighbor interaction . In this study, we use the parallel tempering algorithm to study thermodynamics for different diluted ratios [where , where denotes the system volume] and present a phase diagram. The presence of frustration and disorder results in a spin-glass phase, which exists between the stripe antiferromagnetic phase and Néel phase. We present a ground-state energy of and the size dependence of the Edwards-Anderson (EA) order parameter for the spin-glass phase. By scaling the mean energy and EA order parameter from the simulated annealing with the Kibble-Zurek mechanism, we obtain two different dynamic exponents, and , for the spin-glass phase. Experimentally, this model has a close relationship with the plane of the iron-based superconductor , where a spin-glass-like phase was found.
3 More- Received 29 December 2017
DOI:https://doi.org/10.1103/PhysRevB.97.224419
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