Fermi liquid - Non Fermi liquid transition in a holographic model for high temperature superconductors.

In a recent paper, Kiritsis and Li (JHEP01(2016)147) introduced a holographic model to study the competition between different order phases similar to the ones observed in high temperature superconductors (HTSC). Within their model, they found four different phases: the normal phase, the SC phase, the antiferromagnetic phase and a striped phase as a function of temperature and doping. In the present work, we introduce fermions to their holographic model and study the fermionic spectral functions in the normal phase (Non-SC phase) at zero and finite temperature. Combining analytic and numerical methods, we found that for a range of parameters of the model there is a crossover from a Landau Fermi liquid to a strange metallic phase (Non Fermi liquid) as the doping is decreased.