Symmetric and non-symmetric vortex-antivortex molecules in fourfold superconducting geometry
Superconductivity
2008-10-27 v1
Abstract
In submicron superconducting squares in a homogeneous magnetic field, Ginzburg-Landau theory may admit solutions of the vortex-antivortex type, conforming with the symmetry of the sample [Chibotaru et al., Nature 408, 833 (2000)]. Here we show that these fascinating, but never experimentally observed states, can be enforced by artificial fourfold pinning, with their diagnostic features enhanced by orders of magnitude. The second-order nucleation of vortex-antivortex molecules can be driven either by temperature or applied magnetic field, with stable asymmetric vortex-antivortex equilibria found on its path.
Keywords
Cite
@article{arxiv.0810.4415,
title = {Symmetric and non-symmetric vortex-antivortex molecules in fourfold superconducting geometry},
author = {R. Geurts and M. V. Milošević and F. M. Peeters},
journal= {arXiv preprint arXiv:0810.4415},
year = {2008}
}
Comments
5 pages, 5 figures