Topological hierarchy matters — topological matters with superlattices of defects
He Jing1, Kou Su-Peng2, †,
       

(a) The illustration of topological px + ipy SC. (b) The energy splitting as a function of the space distance of two vortices. (c) The band structure of the topological superconductor with vortex superlattice on a cylindrical geometry. (d) The illustration of the gauge choice of the square Majorana lattice. Moving along the arrow, the fermion acquires a phase shift π/2. The accumulated phase encircling each triangular lattice plaquette anti-clockwise is −π/2. From Ref. [16].