Extended Data Fig. 3: Momentum summation.
From: Unconventional spectral signature of Tc in a pure d-wave superconductor
a, Sθ(T)/Sθ(140 K) plotted as a function of Fermi surface angle θ. We assume that Sθ=0(T) ∝ T. All the other data points are interpolated from the temperature evolutions shown in Fig. 1b. b, Spectral function of the antibonding band integrated along the Brillouin zone boundary. c, Sθ(140 K) as a function of θ. Inset shows the tight-binding Fermi surface in the first quadrant of Brillouin zone. Curves in b and c are calculated using an ARPES-determined tight-binding dispersion with different constant scattering rates. The antinodal scattering rate at 140 K is around 35 meV in our ARPES data. d, Temperature evolution of S calculated using data in a and c. e, Temperature dependence of γ obtained as the derivative of data in d. In d and e, the bulk results are plotted in black for comparison.
