Observation of Strongly Heterogeneous Dynamics at the Depinning Transition in a Colloidal Glass

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2019
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Şenbil, Nesrin
Zhang, Chi
Scheffold, Frank
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Physical Review Letters. 2019, 122(10), 108002. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.122.108002
Zusammenfassung

We study experimentally the origin of heterogeneous dynamics in strongly driven glass-forming systems. Thereto, we apply a well-defined force with a laser line trap on individual colloidal polystyrene probe particles seeded in an emulsion glass composed of droplets of the same size. Fluid and glass states can be probed. We monitor the trajectories of the probe and measure displacements and their distributions. Our experiments reveal intermittent dynamics around a depinning transition at a threshold force. For smaller forces, linear response connects mean displacement, and quiescent mean squared displacement. Mode coupling theory calculations rationalize the observations.

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ISO 690ŞENBIL, Nesrin, Markus GRUBER, Chi ZHANG, Matthias FUCHS, Frank SCHEFFOLD, 2019. Observation of Strongly Heterogeneous Dynamics at the Depinning Transition in a Colloidal Glass. In: Physical Review Letters. 2019, 122(10), 108002. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.122.108002
BibTex
@article{Senbil2019-03-13Obser-45591,
  year={2019},
  doi={10.1103/PhysRevLett.122.108002},
  title={Observation of Strongly Heterogeneous Dynamics at the Depinning Transition in a Colloidal Glass},
  number={10},
  volume={122},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Şenbil, Nesrin and Gruber, Markus and Zhang, Chi and Fuchs, Matthias and Scheffold, Frank},
  note={Article Number: 108002}
}
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