Fig. 3: Superconductivity away from the nematic QCP(δ ≠ 0).
From: Unconventional superconductivity near a nematic instability in a multi-orbital system
In (a), we plot the largest eigenvalue λ of the linearized gap equation defined in Supplementary Discussions VIII41 in different angular momentum channels labeled as λs, λd and λp for the s, d and p − wave respectively as a function of the nematic mass parameter δ. We show how the ratio of these eigenvalues vary with δ in the inset and find λp/λs < λd/λs < 1 which indicates that s − wave is the leading instability. With δ going to zero, the ratios become closer to each other, indicating possible degeneracy among different pairing channels. In (b) we plot the angular variation(θ) of the gap function, Δh(θ)/Tc on the hole pocket for a set of reduced temperatures, t = T/Tc below the transition point Tc for δ = 0.01. In (c) we plot the gap anisotropy α = Δh(θ = π/4)/Δh(θ = 0) as a function of the nematic mass δ and fit (blue dashed line) our result upto second order in δ with the fitting parameters α(δ) = 2.12 δ2 + 0.44 δ.
