Dynamics in two-dimensional glassy systems of crowded Penrose kites
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,...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/138035 |
| _version_ | 1811676970628415488 |
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| author | Li, Yan-Wei Li, Zi-Qi Hou, Zhang-Lin Mason, Thomas G. Zhao, Kun Sun, Zhao-Yan Pica Ciamarra, Massimo |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Li, Yan-Wei Li, Zi-Qi Hou, Zhang-Lin Mason, Thomas G. Zhao, Kun Sun, Zhao-Yan Pica Ciamarra, Massimo |
| author_sort | Li, Yan-Wei |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T02:29:56Z |
| format | Journal Article |
| id | ntu-10356/138035 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:29:56Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1380352023-02-28T19:51:16Z Dynamics in two-dimensional glassy systems of crowded Penrose kites Li, Yan-Wei Li, Zi-Qi Hou, Zhang-Lin Mason, Thomas G. Zhao, Kun Sun, Zhao-Yan Pica Ciamarra, Massimo School of Physical and Mathematical Sciences Science::Physics Entropy Phase behavior 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. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2020-04-22T05:20:59Z 2020-04-22T05:20:59Z 2019 Journal Article 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 2475-9953 https://hdl.handle.net/10356/138035 10.1103/PhysRevMaterials.3.125603 2-s2.0-85077383051 12 3 en Physical Review Materials © 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. application/pdf |
| spellingShingle | Science::Physics Entropy Phase behavior Li, Yan-Wei Li, Zi-Qi Hou, Zhang-Lin Mason, Thomas G. Zhao, Kun Sun, Zhao-Yan Pica Ciamarra, Massimo Dynamics in two-dimensional glassy systems of crowded Penrose kites |
| title | Dynamics in two-dimensional glassy systems of crowded Penrose kites |
| title_full | Dynamics in two-dimensional glassy systems of crowded Penrose kites |
| title_fullStr | Dynamics in two-dimensional glassy systems of crowded Penrose kites |
| title_full_unstemmed | Dynamics in two-dimensional glassy systems of crowded Penrose kites |
| title_short | Dynamics in two-dimensional glassy systems of crowded Penrose kites |
| title_sort | dynamics in two dimensional glassy systems of crowded penrose kites |
| topic | Science::Physics Entropy Phase behavior |
| url | https://hdl.handle.net/10356/138035 |
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