Avalanche Dynamics in Ferroelastics and Ferroelectrics

Ekhard Salje, University of Cambridge
Domains in ferroelastic and ferroelectric materials appear to move smoothly under applied stress or electric fields. A more careful analysis shows that this is not true when the movement is not averaged by the observational method. In fact, virtually all movements are 'jerky' and follow avalanche statistics. I will discuss the main characteristics of such avalanches and their importance for the investigation of defect structures.