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dc.contributor.authorLi, Yan-Weien_US
dc.contributor.authorLi, Zi-Qien_US
dc.contributor.authorHou, Zhang-Linen_US
dc.contributor.authorMason, Thomas G.en_US
dc.contributor.authorZhao, Kunen_US
dc.contributor.authorSun, Zhao-Yanen_US
dc.contributor.authorPica Ciamarra, Massimoen_US
dc.identifier.citationLi, 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.3.125603en_US
dc.description.abstractWe 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.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.relation.ispartofPhysical Review Materialsen_US
dc.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.en_US
dc.titleDynamics in two-dimensional glassy systems of crowded Penrose kitesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionPublished versionen_US
dc.subject.keywordsPhase behavioren_US
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