胶体椭球悬浮液中动力学异质性的形状与Stokes-Einstein及Stokes-Einstein-Debye关系
Shape of Dynamical Heterogeneities and the Stokes-Einstein and Stokes-Einstein-Debye Relations in Suspensions of Colloidal Ellipsoids
AI总结：
本文通过准二维胶体椭球悬浮液实验，揭示动力学异质性形状从弦状到紧凑状的转变是导致Stokes-Einstein及Stokes-Einstein-Debye关系失效的关键，而短程耗尽吸引可维持其有效性。
摘要：
我们研究了在准二维胶体椭球悬浮液中，动力学异质性的形状对Stokes-Einstein（SE）和Stokes-Einstein-Debye（SED）关系有效性的影响。对于具有排斥相互作用的椭球，尽管取向弛豫时间仍与结构弛豫时间保持耦合，但基于Einstein形式的SED关系表现出失效。引人注目的是，我们发现导致SE和SED关系同时失效的原因，是动力学异质性的形状从弦状（string-like）转变为紧凑状（compact），而不仅仅是它们的存在本身。当在椭球之间引入短程耗尽吸引时，由于动力学异质性缺乏形态演化，即使在深度过冷条件下，SE和SED关系仍然保持有效。我们的观察结果与数值预测一致。
英文摘要：
We examine the role of shape of dynamical heterogeneities on the validity of the Stokes-Einstein (SE) and Stokes-Einstein-Debye (SED) relations in quasi-two-dimensional suspensions of colloidal ellipsoids. For ellipsoids with repulsive interactions, although the orientational relaxation time remains coupled to the structural one, the SED relation by the Einstein formalism shows a breakdown. Strikingly, we find that it is the change in the shape of the dynamical heterogeneities from string-like to compact and not just their presence that results in the breakdown of both the SE and SED relations. On introducing a short-range depletion attraction between the ellipsoids, associated with the lack of morphological evolution of dynamical heterogeneities, the SE and SED relations remain valid even for deep supercooling. Our observations are consistent with numerical predictions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
