Tracer diffusion in a dislocated lamellar system

Details Tracer diffusion in a dislocated lamellar system Tracer diffusion in a dislocated lamellar system

2001-10-24

arxiv.org/abs/cond-mat/0110529v1

Phys. Rev. Lett. 88, 178301 (2002)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 2 figures, RevTeX 4

Scientific paper

10.1103/PhysRevLett.88.178301

Many lamellar systems exhibit strongly anisotropic diffusion. When the diffusion across the lamellae is slow, an alternative mechanism for transverse transport becomes important. A tracer particle can propagate in the direction normal to the lamellae, never leaving a particular layer, by going around a screw dislocation. Given the density of positive and negative screw dislocations, we calculate the statistical properties of the transverse transport. When either positive or negative dislocations are in excess, the tracer moves ballistically normally to the layers with the mean square of the displacement growing like the square of time T^2. When the average dislocation charge is zero, the mean square of the normal displacement grows like T log T for large times. To obtain this result, the trajectory of the tracer must be smoothed over distances of order of the dislocation core size.

Affiliated with

Also associated with

No associations

Rating

Tracer diffusion in a dislocated lamellar system does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Tracer diffusion in a dislocated lamellar system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracer diffusion in a dislocated lamellar system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-359707