Spatial cooperativity in soft glassy flows

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Goyon, J., Colin, A., Ovarlez, G., Ajdari, A., Bocquet, L., Nature 454 (2008).


spatial cooperativity, glass, velocity profile, shear stress, shear strain, Couette cell


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A general feature of glassy materials is a strong nonlinear flow rule relating stress and strain. This feature is no well-documented and poorly understood. Many have tried to understand the glass transition by studying the dynamical heterogeneities in glass-forming materials, but Using a local velocity measurement technique, the authors measure the local flow of a film of confined glassy material.