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RESEARCH PRODUCT
Strain pattern in supercooled liquids
Sebastian FritschiMatthias FuchsBernd IllingPeter KeimDavid HajnalChristian L. Klixsubject
PhysicsCondensed matter physicsStrain (chemistry)Zero (complex analysis)FOS: Physical sciencesGeneral Physics and AstronomyVideo microscopy02 engineering and technologyCondensed Matter - Soft Condensed Matter021001 nanoscience & nanotechnology01 natural sciencesShear modulusCondensed Matter::Soft Condensed Matter0103 physical sciencesShear stressSoft Condensed Matter (cond-mat.soft)ddc:530010306 general physics0210 nano-technologySupercoolingGlass transitionBrownian motiondescription
Investigations of strain correlations at the glass transition reveal unexpected phenomena. The shear strain fluctuations show an Eshelby-strain pattern ($\,\sim \cos{(4\theta)}/r^2\,$), characteristic for elastic response, even in liquids at long times [1]. We address this using a mode-coupling theory for the strain fluctuations in supercooled liquids and data from both, video microscopy of a two-dimensional colloidal glass former and simulations of Brownian hard disks. We show that long-ranged and long-lived strain-signatures follow a scaling law valid close to the glass transition. For large enough viscosities, the Eshelby-strain pattern is visible even on time scales longer than the structural relaxation time $\tau$ and after the shear modulus has relaxed to zero.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-06-10 |