Li, Yan-Wei ; Mishra, Chandan K. ; Sun, Zhao-Yan ; Zhao, Kun ; Mason, Thomas G. ; Ganapathy, Rajesh ; Pica Ciamarra, Massimo (2019) Long-wavelength fluctuations and anomalous dynamics in 2-dimensional liquids Proceedings of the National Academy of Sciences of the United States of America, 116 (46). pp. 22977-22982. ISSN 0027-8424
Full text not available from this repository.
Official URL: https://doi.org/10.1073/pnas.1909319116
Related URL: http://dx.doi.org/10.1073/pnas.1909319116
Abstract
Long-wavelength Mermin-Wagner fluctuations prevent the existence of translational long-range order, in two-dimensional systems at finite temperature. Their dynamical signature, which is the divergence of the vibrational amplitude with the system size, also affects disordered solids and washes out the transient solid-like response generally exhibited by liquids cooled below their melting temperature. Through a combined numerical and experimental investigation, here we show that long-wavelength fluctuations are also relevant at high temperature, where the liquid dynamics does not reveal a transient solid-like response. In this regime, they induce an unusual but ubiquitous decoupling between long-time diffusion coefficient D and structural relaxation time τ, where D ∝ τ-κ, with κ > 1. Long-wavelength fluctuations have a negligible influence on the relaxation dynamics only at extremely high temperatures, in molecular liquids, or extremely low densities, in colloidal systems.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to National Academy of Sciences, USA. |
ID Code: | 137891 |
Deposited On: | 22 Aug 2025 11:30 |
Last Modified: | 22 Aug 2025 11:30 |
Repository Staff Only: item control page