Figure 1
Momentum-dependent electronic structure of α-RuCl3.
ARPES constant-energy maps at different binding energies of (a) 1.2 eV, (b) 5.0 eV, and (c) 5.7 eV. Red-dashed hexagons indicates the Brillouin zone of α-RuCl3. (d) Band dispersions from ARPES along the MΓM line. Calculated bands by LDA + SOC + U (U − JH = 4.5 eV) are depicted on the right-hand side of (d). Red solid lines and blue dashed lines represent Ru 4d and Cl 3p bands, respectively. Note that the existence of a flat band at −2.5 eV and the clear separation between Ru 4d bands and Cl 3p bands are not reproduced in the LDA + SOC + U calculations.
