Dynamics and Time Scales of Higher-Order Correlations in Supercooled Colloidal Systems.

ABSTRACT: The dynamics and time scales of higher-order correlations are studied in supercooled colloidal systems. A combination of X-ray photon correlation spectroscopy (XPCS) and X-ray cross-correlation analysis (XCCA) shows the typical slowing of the dynamics of a hard sphere system when approaching the glass transition. The time scales of higher-order correlations are probed using a novel time correlation function g_C, tracking the time evolution of cross-correlation function C. With an increasing volume fraction, the ratio of relaxation times of g_C to the standard individual particle relaxation time obtained by XPCS increases from ∼0.4 to ∼0.9. While a value of ∼0.5 is expected for free diffusion, the increasing values suggest that the loca

SUBMITTER: Striker NN 

PROVIDER: S-EPMC10226114 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature