Figure 1: Low-energy synchrotron-radiation ARPES data of overdoped Bi2212.
From: Relation between the nodal and antinodal gap and critical temperature in superconducting Bi2212
The data were collected at T=10 K with a sample of Tc=80 K (OD80) and with hν=8.5 eV. The globally resolved doublet is ascribed to the BB and AB of the CuO2 bilayer. (a) Schematic Brillouin zone and off-node angle θ about the (π,π) point. (b) Energy-momentum plot along the off-nodal cut marked by a white arrow in panel d. (c,d) Momentum-space mappings at energies of ω=0 and −20 meV over the fields of view marked by grey rectangles in panel a. Blue curves denote the Fermi surfaces determined as minimum-gap loci. (e,f) Energy-verses-θ plots of the spectral images along the Fermi surfaces of AB (left) and BB (right), symmetrized with respect to ω=0.
