Boundary-obstructed topological superconductor in buckled honeycomb lattice under perpendicular electric field

In this work, we show that a buckled honeycomb lattice can host boundary-obstructed topological superconductor (BOTS) in the presence of f-wave spin-triplet pairing (fSTP). The underlying structure allows for manipulation both chemical potential and sublattice using double gate setup. Although finite stabilize fSTP with possible higher-order band topology, because it also breaks relevant symmetry, stability corner modes is not guaranteed. Here on gives BOTS under nonzero potential, thus survive as long boundary gapped. Also, by examining large limit where be decomposed into two triangular lattices, normal state are quintessential ingredient leading to BOTS. Thus effective Hamiltonian becomes nothing but Kitaev chains, which eventually