$^{3}$He-R: A Topological $s^{\pm}$ Superfluid with Triplet Pairing
  We show that when spin and orbital angular momenta are entangled by spin-orbit coupling, this transforms a topological spin-triplet superfluid/superconductor state, such as $^{3}$He-B, into a topological $s^{\pm}$ state, with non-trivial gapless edge states. Similar to $^{3}$He-B, the $s^{\pm}$ state also minimizes on-site Coulomb repulsion for weak to moderate interactions. A topological phase transition into a $d$-wave state occurs for sufficiently strong spin-orbit coupling. 
T.Tzen Ong, Piers Coleman
cond-mat.supr-con cond-mat.str-el