| Title: |
Particle response during the yielding transition of colloidal glasses |
| Authors: |
Denisov, D. V.; Dang, M. T.; Struth, B.; Wegdam, G. H.; Schall, P. |
| Publication Year: |
2014 |
| Collection: |
ArXiv.org (Cornell University Library) |
| Subject Terms: |
Soft Condensed Matter |
| Description: |
Yielding is central to the relaxation, flow and fracture of a wide range of soft and molecular glasses, but its microscopic origin remains unclear. Here, we elucidate the yielding of a colloidal glass by using x-ray scattering to monitor the structure factor during the yielding process. We apply a recently introduced combination of small-angle x-ray scattering and rheology to the oscillatory shear, and follow the structure factor during the increasing strain amplitude. Surprisingly, we observe a sharp transition in the orientational ordering of the nearest-neighbor structure upon yielding, in contrast to the smooth variation of the viscoelastic moduli. This transition is accompanied by a sudden change of intensity fluctuations towards Gaussian distributions. We thus identify yielding as a new, dynamically induced transition of the glass in response to the applied shear. ; 5 pages, 4 figures |
| Document Type: |
text |
| Language: |
unknown |
| Relation: |
http://arxiv.org/abs/1401.2106 |
| Availability: |
http://arxiv.org/abs/1401.2106 |
| Accession Number: |
edsbas.728682E4 |
| Database: |
BASE |