|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'503'724
Articles rated: 2609
23 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Dynamics of a Rigid Rod in a Glassy Medium | | Angel J. Moreno
; Walter Kob
; | | Date: |
20 Oct 2003 | | Subject: | Disordered Systems and Neural Networks | cond-mat.dis-nn | | Abstract: | We present simulations of the motion of a single rigid rod in a disordered static 2d-array of disk-like obstacles. The rotational, $D_{
m R}$, and center-of-mass translational, $D_{
m CM}$, diffusion constants are calculated for a wide range of rod length $L$ and density of obstacles $
ho$. It is found that $D_{
m CM}$ follows the behavior predicted by kinetic theory for a hard disk with an effective radius $R(L)$. A dynamic crossover is observed in $D_{
m R}$ for $L$ comparable to the typical distance between neighboring obstacles $d_{
m nn}$. Using arguments from kinetic theory and reptation, we rationalize the scaling laws, dynamic exponents, and prefactors observed for $D_{
m R}$. In analogy with the enhanced translational diffusion observed in deeply supercooled liquids, the Stokes-Einstein-Debye relation is violated for $L > 0.6d_{
m nn}$. | | Source: | arXiv, cond-mat/0310447 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER