A recent report of possible room temperature superconductivity in Cu-substituted apatite has sparked interest in understanding high-temperature superconductivity. Density functional theory calculations reveal correlated isolated flat bands at the Fermi level, suggesting a minimal two-band model can explain the low-energy physics in this system. The origins of these bands are attributed to structural distortion induced by Cu ions and a chiral charge density wave from Pb lone pairs. These findings have implications for superconductivity in Cu-doped apatite and a search for new high-Tc superconductors.
