Fig. 3: Effect of exchange coupling. | npj Quantum Materials

Fig. 3: Effect of exchange coupling.

From: Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides

Fig. 3

a Filling-dependent critical temperature for a sizable exchange coupling J/t = 0.5. The exchange coupling generates a d-wave instability, which indicates a chiral d + id ground state. b Superconducting form factors d±(k) extracted from V(k1, k2, k3, k4) which exhibit a large overlap with a linear combination of nearest-neighbor lattice harmonics d1, d2 (solid gray lines) defined in the text. Their chiral superposition d ± id fully gaps the Fermi surface with the gap function Δ(k) shown in the lowest panels (c, d). The phase winds twice around the Fermi surface.

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