Figure 2: SX-ARPES data.
From: Fermi states and anisotropy of Brillouin zone scattering in the decagonal Al–Ni–Co quasicrystal
(a) Sketch of the 3D FS observed in the current experiment with the planes corresponding to the different cuts represented in b–g. Red arrows denote the possible directions where eV-scale HR gap can appear in addition to the one observed along the periodical direction. (b–d) Constant binding energy maps (CEMs) corresponding to the FS cut acquired along the planes parallel to the sample surface at kz=10·(2π/c) denoted as Γ10-point (b) kz=9·(2π/c) denoted as Γ9-point (c) and perpendicular to the sample surface at ky=0 (d). (e–g) CEMs at Eb=−0.6 eV acquired at the same planes as (b–d). The blue and green circles are the guide for the eye lines of Al sp-dispersion contours. (h,j,k) The ARPES intensity (logarithmic grayscale for h and j) maps I(Eb, k||) measured along the directions shown with red arrows in e–g, respectively. (i) The 3D sketch of the sp-band dispersion parabola Eb (kx,ky) hybridized with the TM-d flat band.
