Non-BCS behavior of the pairing susceptibility near the onset of superconductivity in a quantum-critical metal

Artem Abanov, Shang-Shun Zhang, Andrey Chubukov

We analyze the dynamical pairing susceptibility ${\chi }_{pp}({\omega }_m)$ at $T=0$ in a quantum-critical metal, where superconductivity emerges out of a non-Fermi liquid ground state once the…