Single-particle fluctuations and directional correlations in driven hard-sphere glassesMandal, S.; Chikkadi, V.; Nienhuis, B.; Raabe, R.; Schall, P.; Varnik, F.
Published in:Physical Review E
DOI:10.1103/PhysRevE.88.022129
Link to publication
Citation for published version (APA):Mandal, S., Chikkadi, V., Nienhuis, B., Raabe, R., Schall, P., & Varnik, F. (2013). Single-particle fluctuations and directional correlations in driven hard-sphere glasses. Physical Review E, 88, 022129. DOI: 10.1103/PhysRevE.88.022129
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Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Via event-driven molecular dynamics simulations and experiments, we study the packing-fraction and shearrate dependence of single-particle fluctuations and dynamic correlations in hard-sphere glasses under shear. At packing fractions above the glass transition, correlations increase as shear rate decreases: the exponential tail in the distribution of single-particle jumps broadens and dynamic four-point correlations increase. Interestingly, however, upon decreasing the packing fraction, a broadening of the exponential tail is also observed, while dynamic heterogeneity is shown to decrease. An explanation for this behavior is proposed in terms of a competition between shear and thermal fluctuations. Building upon our previous studies [Chikkadi et al., Europhys. Lett. 100, 56001 (2012)], we further address the issue of anisotropy of the dynamic correlations.