Towards a more complex superconducting state of cuprates*

Compared with the mysterious normal (pseudogap) state of high-Tc superconductivity, the superconducting state itself is generally deemed much better understood. Being most relevant and intensively characterized in momentum-space, its lowest-lying excitations are conceived to concentrate on and exhibit d-wave-like Bogoliubov dispersions along the entire underlying Fermi surface. By using angle-resolved photoemission spectroscopy, here we unveil an elevated complexity of the superconducting state of Bi2201 beyond this picture, which points to a highly non-trivial interplay between coherent superconductivity and coexisting pseudogap of distinct symmetry. We show simulations which assume simple density-wave nature of the pseudogap provide a good starting point to understand this more complex superconducting state.