Is spontaneous vortex generation in superconducting 4Hb-TaS${}_2$ from vison-vortex nucleation with ${\mathbb{Z}}_2$ topological order?

Rui Leonard Luo, Gang Chen

We propose the superconducting van der Waals material 4Hb-TaS${}_2$ to realize the ${\mathbb{Z}}_2$ topological order and interpret the recent discovery of the spontaneous vortex gener…