Abstract
The role of the defects in the transitions from order to disorder of the ordered states is investigated in a non-equilibrium system. The experimental system is a convective fluid driven to turbulence. Both the stationary and time-dependent homogeneous ordered states may become unstable against localized perturbations which create defects. Then, the defects may contribute either to the disorganization of the states, or they may mediate rapid transitions to fully ordered states of lower symmetry. This role can be understood from the topology and from the instability of the core of the defects and is reminiscent of the displacive transitions in solids.
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Ribotta, R., Joets, A. (1991). Defects and Order to Disorder Transition in Non-Equilibrium Structures. In: Bishop, A.R., Pokrovsky, V.L., Tognetti, V. (eds) Microscopic Aspects of Nonlinearity in Condensed Matter. NATO ASI Series, vol 264. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5961-6_5
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