%0 Journal Article
%T Translational and Rotational Dynamical Heterogeneities in Granular Systems
%+ Shanghai Jiao Tong University [Shanghai]
%+ Shanghai Jiao Tong University School of Medicine
%+ Laboratoire Charles Coulomb (L2C)
%+ National Laboratory of  Solid State  Microstructures [Nanjing  University] (LSSMS)
%A Kou, Binquan
%A Cao, Yixin
%A Li, Jindong
%A Xia, Chengjie
%A Li, Zhifeng
%A Dong, Haipeng
%A Zhang, Ang
%A Zhang, Jie
%A Kob, Walter
%A Wang, Yujie
%< avec comité de lecture
%Z L2C:18-105
%@ 0031-9007
%J Physical Review Letters
%I American Physical Society
%V 121
%P 018002-1
%8 2018-07-06
%D 2018
%R 10.1103/PhysRevLett.121.018002
%Z Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]
%Z Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn]Journal articles
%X We use X-ray tomography to investigate the translational and rotational dynamical heterogeneitiesof a three dimensional hard ellipsoids granular packing driven by oscillatory shear. We find thatparticles which translate quickly form clusters with a size distribution given by a power-law withan 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 androtational degrees of freedom. Surprisingly these clusters are formed already at time scales that aremuch shorter than theα−relaxation time, in stark contrast to the behavior found in glass-forming systems.
%G English
%2 https://hal.science/hal-01833984/document
%2 https://hal.science/hal-01833984/file/1803.10929.pdf
%L hal-01833984
%U https://hal.science/hal-01833984
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021