Pairing interaction near a nematic quantum critical point of a three-band CuO2 model

Here we calculate the pairing interaction and the k dependence of the gap function associated with the nematic charge fluctuations of a CuO2 model. We find that the nematic pairing interaction is attractive for small momentum transfer and that it gives rise to d-wave pairing. As the doping p approaches a quantum critical point, the strength of this pairing increases and higher d-wave harmonics contribute to the k dependence of the superconducting gap function, reflecting the longer range nature of the nematic fluctuations.