Fig. 2: Schematic diagram for the hopping process and order parameters.
From: Impact of pressure and apical oxygen vacancies on superconductivity in La3Ni2O7
a Schematic diagram for the intra-layer nearest-neighboring hopping process at ambient pressure, and the two types of intra-layer order parameters(Δ1,2, χ1,2). b Schematic diagram for the inter-layer order parameters (Δ⊥, χ⊥).
