Fig. 1: Fermi surface (FS) in the original Brillouin zone (BZ).
From: Time-reversal symmetry breaking, collective modes, and Raman spectrum in pair-density-wave states
a FS without superconducting orders. b CEC for a d-wave SC in the original BZ for \(| {\overline{\Delta }}_{0}| =0.2t\). The red dot indicates the nodal point. The dashed and solid curves are for electron-like and hole-like dispersions, respectively. c FS in the folded BZ. d CEC for a pure PDW with momentum \({\boldsymbol{Q}}=(\frac{\pi }{4},0)\) in the folded BZ for \(| {\overline{\Delta }}_{\pm {\boldsymbol{Q}}}| =0.2t\). The red curves indicate the residual Fermi surfaces. e CEC for a PDW+SC case with φQ = φ−Q and φ0 = π/2 + φQ and with \(| {\overline{\Delta }}_{0}| =0.1t\) and \(| {\overline{\Delta }}_{\pm {\boldsymbol{Q}}}| =0.2t\). Different colors correspond to different energies, specified to the right of each panel.
