2025/05/11 by Subhanker Howlader, Prasenjit Das, Howlader, Subhanker +3
Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Quantum many-body systems #Statistical Mechanics (cond-mat.stat-mech) #Theoretical and Computational Physics #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2505.06873
openalex publication_date 2025/05/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study domain growth kinetics in a random-field system in the presence of a spatially correlated disorder hi( r) after an instantaneous quench at a finite temperature T from a random initial state corresponding to T=∞. The correlated disorder field hi( r) arises due to the presence of magnetic impurities, decaying spatially in a power-law fashion. We use Glauber spin-flip dynamics to simulate the kinetics at the microscopic level. The system evolves via the formation of ordered magnetic domains. We characterize the morphology of domains using the equal-time correlation function C(r,t) and structure factor S(k,t). In the large-k limit, S(k, t) obeys Porod's law: S(k, t)∼ k-(d+1). The average domain size L(t) asymptotically follows double logarithmic growth behavior.