Renormalized q-dependent Spin Susceptibility by inverting the Random Phase Approximation: Implications for quantitative assessment of the role of spin fluctuations in 2D Ising superconductor NbSe${}_2$

Suvadip Das, Igor I. Mazin

Accurate determination of the full momentum-dependent spin susceptibility $\chi (\mathbf{q})$ is very important for the description of magnetism and superconductivity. While in princi…