Avalanche mixing and the simultaneous collapse of two media under uniaxial stress.

Salje, Ekhard K H; Liu, Hanlong; Xiao, Yang; Jin, Linsen; Planes, Antoni; Vives, Eduard; Xie, Kainan; Jiang, Xiang · Phys Rev E · 2019

basic_science · Level V

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Abstract

Avalanches in coal and sandstone samples under common uniaxial stress serve as a model for mixing of avalanche exponents in ceramics, multiferroics, and alloys. The two media are sandwiched together and subjected to common uniaxial stress using high- and low-stress compression. Each medium collapses individually through avalanches that often coincide with secondary avalanches into the other medium. The total avalanche time sequence allows a detailed investigation of the mixing by superposition and delayed coincidence. Correlations can be described by an inter-media Båth's law.