1999/10/27 by F. Ricci-Tersenghi, F Ricci-Tersenghi, F. Ritort +1 · 1 citation
Materials Science · Physics and Astronomy · #Ageing #Chemical and Physical Properties of Materials #Ground state #Magnetization #Material Dynamics and Properties #Remanence #Spin (aerodynamics) #Spin glass #Theoretical and Computational Physics #Viscosity #cond-mat.dis-nn #cond-mat.stat-mech
paper · pdf · doi:10.1088/0305-4470/33/20/301
published as J. Phys. A 33, 3727 (2000) · 4 pages and 3 figures. References updated
arxiv created 1999/10/27 · openalex publication_date 2000/05/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the non-equilibrium behaviour of three-dimensional spin glasses in the Migdal-Kadanoff approximation. This approximation is exact for disordered hierarchical lattices which have a unique ground state and equilibrium properties correctly described by the droplet model. Extensive numerical simulations show that this model lacks ageing in the remanent magnetization as well as a maximum in the magnetic viscosity in disagreement with experiments as well as with numerical studies of the Edwards-Anderson model. This result strongly limits the validity of the droplet model (at least in its simplest form) as a good model for real spin glasses.