Single-layer $\beta$-Bi$_{2}$Pd: a phonon-mediated 2D topological superconductor.

Topological superconductors, characterized by topologically nontrivial states residing in a superconducting gap, are a recently discovered class of materials having Majorana Fermions. Several single-material 3D topological superconductors have been theoretically predicted and experimentally confirmed. Here, we show that 2D single-layer $\beta$-Bi$_{2}$Pd, is an intrinsic electron-phonon superconductor with nontrivial Fu-Kane $Z_{2}$ indices and topological edge states. This then leads to the expectation of 2D topological superconductivity and Majorana bound states in monolayer $\beta$-Bi$_{2}$Pd.