Discovery of Dynamical Heterogeneity in a Supercooled Magnetic Monopole Fluid
By measuring microsecond-resolved spontaneous magnetization fluctuations in Dy2Ti2O7, researchers directly detected dynamical heterogeneity in a supercooled magnetic monopole fluid, observing a sharp bifurcation in monopole noise and the emergence of correlated current bursts that evolve with escalating spatiotemporal scales as the system approaches the glass transition.