2018/12/21 by Ryoji Miyazaki, Takeshi Kawasaki, Kunimasa Miyazaki · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Chemical and Physical Properties of Materials #Cluster (spacecraft) #Dynamical heterogeneity #Dynamics (music) #Gravitational singularity #Logarithm #Material Dynamics and Properties #Particle (ecology) #Phase (matter) #Relaxation (psychology) #cond-mat.soft
paper · pdf · doi:10.1063/1.5086379
15 pages, 16 figures
arxiv created 2018/12/21 · openalex created_date 2019/01/01 · openalex publication_date 2019/02/20 · arxiv updated 2019/03/27 · openalex updated_date 2026/08/05
We numerically investigate the slow dynamics of a binary mixture of ultrasoft particles interacting with the generalized Hertzian potential. If the softness parameter, α, is small, the particles at high densities start penetrating each other, form clusters, and eventually undergo the glass transition. We find multiple cluster-glass phases characterized by a different number of particles per cluster, whose boundary lines are sharply separated by the cluster size. Anomalous logarithmic slow relaxation of the density correlation functions is observed in the vicinity of these glass-glass phase boundaries, which hints the existence of the higher-order dynamical singularities predicted by the mode-coupling theory. Deeply in the cluster glass phases, it is found that the dynamics of a single particle is decoupled from that of the collective fluctuations.