Please use this identifier to cite or link to this item:
|Title:||Dynamics in two-dimensional glassy systems of crowded Penrose kites||Authors:||Li, Yan-Wei
Mason, Thomas G.
Pica Ciamarra, Massimo
|Keywords:||Science::Physics||Issue Date:||2019||Source:||Li, Y.-W., Li, Z.-Q., Hou, Z.-L., Mason, T. G., Zhao, K., Sun, Z.-Y., & Pica Ciamarra, M. (2019). Dynamics in two-dimensional glassy systems of crowded Penrose kites. Physical Review Materials, 3(12), 125603-. doi:10.1103/PhysRevMaterials.3.125603||Journal:||Physical Review Materials||Abstract:||We investigate the translational and rotational relaxation dynamics of a crowded two-dimensional system of monodisperse Penrose kites, in which crystallization, quasicrystallization and nematic ordering are suppressed, from low to high area fractions along the metastable ergodic fluid branch. First, we demonstrate a decoupling between both the translational and the rotational diffusion coefficients and the relaxation time: the diffusivities are not inversely proportional to the relaxation time, neither in the low-density normal liquid regime nor in the high-density supercooled regime. Our simulations reveal that this inverse proportionality breaks in the normal liquid regime due to the Mermin-Wagner long-wavelength fluctuations and in the supercooled regime due to the dynamical heterogeneities. We then show that dynamical heterogeneities are mainly spatial for translational degrees of freedom and temporal for rotational ones, there is no correlation between the particles with largest translational and rotational displacements, and different dynamical length scales characterize the translational and the rotational motion. Hence, despite the translational and the rotational glass-transition densities coincide, according to a mode-coupling fit, translations and rotations appear to decorrelate via different dynamical processes.||URI:||https://hdl.handle.net/10356/138035||ISSN:||2475-9953||DOI:||10.1103/PhysRevMaterials.3.125603||Schools:||School of Physical and Mathematical Sciences||Rights:||© 2019 American Physical Society. All rights reserved. This paper was published in Physical Review Materials and is made available with permission of American Physical Society.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
Files in This Item:
|Li et al. - 2019 - Dynamics in two-dimensional glassy systems of crowded Penrose kites.pdf||4.42 MB||Adobe PDF|
Updated on May 25, 2023
Web of ScienceTM
Updated on May 30, 2023
Updated on May 31, 2023
Updated on May 31, 2023
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.