Extended Data Fig. 2: ARPES electronic structure and photon energy dependence.
From: Frustrated electron hopping from the orbital configuration in a two-dimensional lattice
ARPES E(k) intensity map (LH polarization) along the \(\overline{\rm{M}}-\overline{{\Gamma}}-\overline{\rm{M}}\) line of the surface BZ at various incoming photon energies hν, a 127 eV b 136 eV and c 142 eV, probing distinct slices of kz, marked in e. The weak variation of these maps evidences the quasi-2D nature of the electronic structure. d ARPES Fermi surface cross-sections in the kx – ky plane (LV polarization) at various kz. The cross-sections are similarly invariant with kz. e An ARPES kz – k|| map along the \(\overline{\rm{M}}-\overline{{\Gamma}}-\overline{\rm{M}}\) line (LH polarization) exhibits cylindrical FSs for all three pockets. The dashed lines show the approximate kz sampled by the E(k) maps a – c. ARPES FS maps (hν = 125 eV) at f 100 meV g 150 meV h and 750 meV below EF. The experimental maps show good correspondence to DFT calculated FSs at i 100 meV j 150 meV and k 645 meV below EF.
