Three-dimensional spin–orbit coupled Fermi gases: Fulde–Ferrell pairing, Majorana fermions, Weyl fermions, and gapless topological superfluidity<xref ref-type="fn" rid="cpb142766fn1">*</xref>

Three-dimensional spin–orbit coupled Fermi gases: Fulde–Ferrell pairing, Majorana fermions, Weyl fermions, and gapless topological superfluidity*

Liu Xia-Ji^a), Hu Hui^a), Pu Han^b),^c)†

Majorana surface modes with a hard-wall confinement along the x direction in the gapless topo-FF₂ phase ( h _in = 0.4 E _F), at (a) k _y = 0, (b) along the k_y = k_z line, or (c) at k_z = 0. The wave-functions of the Majorana mode at k_y = k_z = 0 are shown in panel (d), which are well localized near the two boundaries x = 0 and .