The role of the apical oxygen in cuprate high-temperature superconductors

Samuel Vadnais, Rémi Duchesne, Kristjan Haule +3

Scanning tunneling microscopy measurements exploiting the natural superstructure modulation of the cuprate superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi-2212) have revealed a po…