1/f noise and dynamical heterogeneity in glasses - art. no. 052901

We investigate the relationship between two experimental sets of data relat ed to dynamical heterogeneity, the coefficient alpha of 1/f(alpha) dipolar noise derived from the nonexponentiality of the dielectric or magnetic resp onse near and above the mean relaxation time, and the range Deltaz of the r elaxation times. We find that in different classes of glasses, including sp in and proton glasses, relaxor materials, and glass-forming liquids, this r elationship exhibits the same trend.