Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.025702
Keywords
-
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [20740245]
- Grants-in-Aid for Scientific Research [20740245] Funding Source: KAKEN
Ask authors/readers for more resources
We use molecular dynamics simulations to investigate the coupling and decoupling between translational and rotational dynamics in a glass-forming liquid of dumbbells. We find that the coupling between the translational (tau(*C)(q)) and rotational (tau(2)) relaxation times increases with decreasing temperature T, whereas the coupling decreases between the translational (D-t) and rotational (D-r) diffusivities. In addition, the T dependence of D-t decouples from that of 1/tau(2). We show that the decreasing coupling between D-t and D-r is only apparent due to the inadequacy of the concept of the rotational diffusion constant for describing the reorientational dynamics in the supercooled state. We also argue that the coupling between tau(*C)(q) and tau(2) and the decoupling between D-t and 1/tau(2) can be consistently understood in terms of the growing dynamic length scale.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available