Fig. 4: Nontrivial topology of the nodal f-wave phase.
a Locations of f-wave nodes in the momentum space of k0 = (k0,x, k0,y). Chiralities of nodes indicated by “ ± " signs in the φ = 0 phase with \({f}_{x({x}^{2}-3{y}^{2})}\)-wave pairing symmetry. b Edge spectrum of the Bogoliubov-de-Gennes (BdG) Hamiltonian HBdG with phase difference φ = 0 in a strip geometry as a function of ky,0 along edges oriented in the y-direction, calculated using the lattice model in Eq. (8)–(9) with ΔNN = 0 such that only the \({f}_{x({x}^{2}-3{y}^{2})}\)-wave component is present. Inset: Nontrivial topology of nodal f-wave phase is characterized by the BDI invariant NBDI as a function of ky,0 (see Supplementary Note 7). The regions with NBDI = + 1( − 1) correspond to regions with Majorana zero modes (MZMs) highlighted in red (blue) in (b). k0,x, k0,y are given in units of Å−1.
