Figure 2: Evolution of parameters across the topological phase boundary.
From: Topological Fulde–Ferrell–Larkin–Ovchinnikov states in spin–orbit-coupled Fermi gases

(a,b) Evolution of the minimum excitation gap (a), the order parameter (a:inset) and pairing momentum (b) with increasing chemical potential. A full gap closes and opens again by traversing the continuous phase boundary between the tFF state and the gFF state. In these subplots, hx/h=0.1. (c,d) Evolution of the minimum excitation gap and the pairing order parameter (insets) with increasing in-plane field hx, with: (c) μ/h=1 and (d) μ/h=0.8. Other parameters used in this figure are Eb/h=0.5 and αkh/h=1.