Spontaneous Long-range Vortex-antivortex Pair in the Two-band 2D Superconductor
arXiv:1901.10149
Abstract
The relaxation iterative method is used to minimize Ginzburg-Landau model for the two-band superconductor with Josephson-coupling. A stable spontaneous vortex-antivortex pair with long range order has been revealed. Our result appears due to the Josephson-coupling effect, which leads to a linearly-dependence of total free energy on the distance between vortex-antivortex pair, hence accounts for this phenomenon.
Keywords:two-band superconductor, Josephson-coupling, vortex-antivortex pair, relaxation iterative method