2001/03/02 by Jairo Sinova, Geoff Canright · 1 citation
Physics and Astronomy · #Complex Network Analysis Techniques #Opinion Dynamics and Social Influence #Theoretical and Computational Physics #cond-mat.dis-nn
paper · pdf · doi:10.1103/physrevb.64.094402
published as Phys. Rev. B 64, 094402 (2001). · 10 pages, 8 figures, submitted to PRB, original submission had fig4 and fig5 not readable. No changes have been made
arxiv created 2001/03/02 · openalex publication_date 2001/07/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the phase structure of the random-field Ising model with a bimodal random-field distribution. Our aim is to test for the possibility of an equilibrium spin-glass phase, and for replica symmetry breaking (RSB) within such a phase. We study a low-temperature region where the spin-glass phase is thought to occur, but which has received little numerical study to date. We use the exchange Monte Carlo technique to acquire equilibrium information about the model, in particular the P(q) distribution and the spectrum of eigenvalues of the spin-spin correlation matrix (which tests for the presence of RSB). Our studies span the range in parameter space from the ferromagnetic to the paramagnetic phase. We find, however, no convincing evidence for any equilibrium glass phase, with or without RSB, between these two phases. Instead we find evidence [principally from the P(q) distribution] that there are only two phases at this low temperature, with a discontinuity in the magnetization at the transition like that seen at other temperatures.