Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2005-11-09
Nonlinear Sciences
Chaotic Dynamics
18 pages, 16 figures, accepted for publication in PRB
Scientific paper
10.1103/PhysRevB.72.205208
We studied the dynamics of a quasi-one-dimensional chain-like system of charged particles at low temperature, interacting through a screened Coulomb potential in the presence of a local constriction. The response of the system when an external electric field is applied was investigated. We performed Langevin molecular dynamics simulations for different values of the driving force and for different temperatures. We found that the friction together with the constriction pins the particles up to a critical value of the driving force. The system can depin \emph{elastically} or \emph{quasi-elastically} depending on the strength of the constriction. The elastic (quasi-elastic) depinning is characterized by a critical exponent $\beta\sim0.66$ ($\beta\sim0.95$). The dc conductivity is zero in the pinned regime, it has non-ohmic characteristics after the activation of the motion and then it is constant. Furthermore, the dependence of the conductivity with temperature and strength of the constriction was investigated in detail. We found interesting differences between the single and the multi-chain regimes as the temperature is increased.
Peeters François M.
Piacente G.
No associations
LandOfFree
Pinning and depinning of a classic quasi-one-dimensional Wigner crystal in the presence of a constriction 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 Pinning and depinning of a classic quasi-one-dimensional Wigner crystal in the presence of a constriction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pinning and depinning of a classic quasi-one-dimensional Wigner crystal in the presence of a constriction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-104402