Non-monotonic temperature evolution of nonlocal structure-dynamics correlation in CuZr glass-forming liquids
W J Jiang(江文杰) and M Z Li(李茂枝)†
Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
Abstract The structure-dynamics correlations in a nonlocal manner were investigated in CuZr metallic glass-forming liquids via classical molecular dynamics simulations. A spatial coarse-graining approach was employed to incorporate the nonlocal structural information of given structural order parameters in the structure-dynamics relationship. It is found that the correlation between structure order parameters and dynamics increases with increasing coarse-graining length and has a characteristic length scale. Moreover, the characteristic correlation length exhibits a non-monotonic temperature evolution as temperature approaches glass transition temperature, which is not sensitive to the considered structure order parameters. Our results unveil a striking change in the structure-dynamics correlation, which involves no fitting theoretical interpretation. These findings provide new insight into the structure-dynamics correlation in glass transition.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 52031016 and 51631003).
Corresponding Authors:
M Z Li
E-mail: maozhili@ruc.edu.cn
Cite this article:
W J Jiang(江文杰) and M Z Li(李茂枝) Non-monotonic temperature evolution of nonlocal structure-dynamics correlation in CuZr glass-forming liquids 2021 Chin. Phys. B 30 076102
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