“…32 In addition to dispersing octet q-vectors from superconducting QPI, static quasi-periodic "checkerboard" modulations have been observed in both the superconducting and pseudogap phases. 13,15,[17][18][19][21][22][23][24]26,27 Although the origin of these modulations remains unknown, there has been much discussion about their relation to a possible DW order in the pseudogap phase; scenarios that have been proposed include orbital current induced d-density waves, 33 one dimensional stripes, 34 nematic order, 35 short range charge order connected to nested parts of the Fermi surface in antinodal regions, 23,[36][37][38] and disorder-induced charge orders. 39 We present a detailed study of what can be learned from the Z-map in superconducting, DW, and coexisting phases.…”