Translational and Rotational Dynamical Heterogeneities in Granular Systems
| Autor: | Zhifeng Li, Binquan Kou, Walter Kob, Jie Zhang, Haipeng Dong, Yujie Wang, Ang Zhang, Chengjie Xia, Yixin Cao, Jindong Li |
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| Přispěvatelé: | Shanghai Jiao Tong University [Shanghai], Shanghai Jiao Tong University School of Medicine, Laboratoire Charles Coulomb (L2C), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), National Laboratory of Solid State Microstructures [Nanjing University] (LSSMS), Nanjing University (NJU) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
General Physics and Astronomy FOS: Physical sciences Disordered Systems and Neural Networks (cond-mat.dis-nn) Condensed Matter - Disordered Systems and Neural Networks Condensed Matter - Soft Condensed Matter Coupling (probability) 01 natural sciences Ellipsoid Power law Molecular physics 010305 fluids & plasmas Oscillatory shear Distribution (mathematics) Amplitude 0103 physical sciences Cluster (physics) Exponent Soft Condensed Matter (cond-mat.soft) [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn] [PHYS.COND.CM-SM]Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech] 010306 general physics |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2018, 121, pp.018002-1. ⟨10.1103/PhysRevLett.121.018002⟩ |
| ISSN: | 0031-9007 1079-7114 |
| Popis: | We use X-ray tomography to investigate the translational and rotational dynamical heterogeneities of a three dimensional hard ellipsoids granular packing driven by oscillatory shear. We find that particles which translate quickly form clusters with a size distribution given by a power-law with an exponent that is independent of the strain amplitude. Identical behavior is found for particles that are translating slowly, rotating quickly, or rotating slowly. The geometrical properties of these four different types of clusters are the same as those of random clusters. Different cluster types are considerably correlated/anticorrelated, indicating a significant coupling between translational and rotational degrees of freedom. Surprisingly these clusters are formed already at time scales that are much shorter than the $\alpha-$relaxation time, in stark contrast to the behavior found in glass-forming systems. Comment: 9 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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