Collapse of Skyrmions in 2d Ferro- and Antiferromagnets
Strongly Correlated Electrons
2014-01-07 v1 Statistical Mechanics
Abstract
Collapse of a skyrmion due to the discreteness of a crystal lattice in isotropic two-dimensional ferro- and antiferromagnets has been studied analytically and by numerical solution of equations of motion for up to 2000 x 2000 classical spins on a square lattice coupled via Heisenberg exchange interaction. Excellent agreement between analytical and numerical results has been achieved. The lifetime of the skyrmion scales with its initial size, lambda_0, as(lambda_0/a)^5 in ferromagnets and as (lambda_0/a)^2.15 in antiferromagnets, with a being the lattice parameter. This makes antiferromagnetic skyrmions significantly shorter lived than ferromagnetic skyrmions.
Keywords
Cite
@article{arxiv.1204.4848,
title = {Collapse of Skyrmions in 2d Ferro- and Antiferromagnets},
author = {Liufei Cai and Eugene M. Chudnovsky and D. A. Garanin},
journal= {arXiv preprint arXiv:1204.4848},
year = {2014}
}
Comments
4 pages, 5 figures