Scaled and Dynamic Optimizations of Nudged Elastic Bands
mediaposted on 10.10.2019, 14:45 by Per Lindgren, Georg Kastlunger, Andrew A. Peterson
We present a modified nudged elastic band routine that can reduce the number of force calls by more than 50% for bands with nonuniform convergence. The method, which we call “dyNEB”, dynamically and selectively optimizes images on the basis of the perpendicular PES-derived forces and parallel spring forces acting on that region of the band. The convergence criteria are scaled to focus on the region of interest, i.e., the saddle point, while maintaining continuity of the band and avoiding truncation. We show that this method works well for solid state reaction barriersnonelectrochemical in general and electrochemical in particularand that the number of force calls can be significantly reduced without loss of resolution at the saddle point.