Nucleation in a sheared Ising model: effects of external field

Details Nucleation in a sheared Ising model: effects of external field Nucleation in a sheared Ising model: effects of external field

2011-09-23

arxiv.org/abs/1109.5054v1

Progress of Theoretical Physics Supplement 175, 144 (2008)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

Simulations using the Forward Flux Sampling method have shown a nonmonotonic de- pendence of the homogeneous nucleation rate on the shear rate for a sheared two dimensional Ising model [R. J. Allen et al, arXiv cond-mat/0805.3029]. For quasi-equilibrium systems (i.e. in the absence of shear), Classical Nucleation Theory (CNT) predicts the dependence of the critical cluster size and the nucleation rate on the external magnetic field. We investigate the behaviour of the sheared Ising model as a function of the external field. At low exter- nal field strength, the same nonmonotonic behaviour holds and the peak in the nucleation rate is remarkably insensitive to the field strength. This suggests that the same external field-dependence holds for the enhancement of nucleation by shear at low shear rates and the suppression of shear at high shear rates. At high field strength, the nucleation behaviour is qualitatively different. We also analyse the size and shape of the largest cluster in the transition state configurations, as a function of the external field. In the sheared system, the transition state cluster becomes larger and more elongated as the field strength decreases. We compare our results for the sheared system to the predictions of the CNT for the quasi- equilibrium case, and find that the CNT cannot easily be used to describe nucleation in the system under shear.

Affiliated with

Also associated with

No associations

Rating

Nucleation in a sheared Ising model: effects of external field 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 Nucleation in a sheared Ising model: effects of external field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nucleation in a sheared Ising model: effects of external field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-724219