Three-dimensional spin–orbit coupled Fermi gases: Fulde–Ferrell pairing, Majorana fermions, Weyl fermions, and gapless topological superfluidity*
Liu Xia-Jia), Hu Huia), Pu Hanb),c)†
       
Chiral surface modes with a hard-wall confinement along the x direction in the gapless topo-FF2 phase ( h in = h out = 0.4 E F), at (a) k y = 0, (b) along the ky = kz line, or (c) at kz = 0.