Potential topological superconductivity in doped IV-VI semiconductors

We theoretically study potential superconductivity in doped IV-VI semiconductors in the presence of the interaction restricted to the next nearest neighbors. We show that point-group-symmetry-breaking Cooper pairing, for example in the E_u-, the T_1u- or the T_2u-channel, appears in different regions of the phase diagram that is plotted with respect to model parameters such as effective mass anisotropy. The topological properties of these superconductors are also predicted and discussed.