Topologically protected emergent Fermi surface in an Abrikosov vortex lattice

Songyang Pu, Jay D. Sau, Rui-Xing Zhang

We show that a three-dimensional (3D) fully gapped type-II superconductor can feature emergent in-gap Fermi surfaces of Caroli-de Gennes Matricon (CdGM) quasiparticles in the prese…