Spin and charge order in Hg1201

Emergence of charge order in a staggered loop-current phase of cuprate high-temperature superconductors

“…For ∈ [17,32], there are two nearest-neighbor pairs for each α, β, and to remove the ambiguity, the table shows the vector r α→β pointing from α to β. The basis functions with ∈ [33,38] are used to represent the Hartree self-energies.…”

“…There are a total of 38 orbital pairs (α , β ), and these are listed in Table I in Appendix A, along with the corresponding basis functions. Here, we note that ∈ [1,32] labels the directed bonds between nearest-neighbor sites, and ∈ [33,38] labels the six orbitals making up the supercell. With the decomposition (11), we obtain…”

“…14,36 Finally, the wavevector associated with the dCDW connects tips of the remnant Fermi arcs in the pseudogap phase; this suggests that charge order is an instability of, rather than the cause of, the Fermi arcs; 30 indeed, theoretical calculations accurately reproduce experimental wavevectors under this assumption. 26,[37][38][39] Several calculations found instabilities towards dCDW states with ordering wavevectors q oriented along the Brillouin zone diagonal (so-called "diagonal order"), 25,[40][41][42][43][44][45][46][47] in contrast to all the experiments, which find axial order. This discrepancy is resolved by imposing a pseudogap, from which charge order emerges.…”