Fig. 5: Energy direction and resolution.
From: Fermi surface tomography
a Momentum-energy cuts along the high-symmetry ΓK- and ΓM- directions of Bi2Te3 extracted from the differential scans shown in Fig. 4 and converted to the momentum scale. Laser, 6 eV. T = 3 K. Energy step−10 meV. b Same as a, but taken earlier after cleavage and with energy step of 5 meV. c Dispersion along the cut through the antinodes in BSCCO above and below superconducting transition (Tc ~ 65 K). Synchrotron, 24 eV. Energy step−5 meV. Acquisition time of the whole 3D dataset ~20 min. Noise is due to variations of the ring current, which were not recorded and considered. d Vertical cut through the smallest FS of LiFeAs (Fig. 3c, 20 K). Energy step−2 meV. e EDC corresponding to white arrow in b. f EDCs corresponding to white arrows in c and integrated within ~0.05 Å−1 window. g Background EDC from the momentum location shown by white arrow in d shortly after kF so that the spectrum looks like a Fermi edge. It is integrated within 10×10 pixels of the camera from the 500×500 dataset. There are 34 layers in this particular 3D wave—the energy steps taken every 2 meV. Each layer took 20 seconds to record. T = 3 K. h MDC from b. i Leading edge midpoints of the EDCs from c. j Leading edge midpoints from some of the EDCs in d.
