Fig. 2

ARPES characterization of single-layer 1T′-WSe₂. a Sketch of the first Brillouin zone of 1T′-WSe₂. Relevant high-symmetry points are indicated. b Three surface Brillouin zones corresponding to the three rotational 1T′-WSe₂ domains on the BLG surface represented by three different colors. The Fermi surface pockets from each rotational domain are indicated by ellipses of corresponding colors. Black dashed line represents the experimental ARPES line cut shown in d. c Experimental 1T′-WSe₂ Fermi surface measured by ARPES. d High-resolution ARPES band dispersion along the Y-Γ-Y direction. Due to the presence of rotational domains, contributions from both Γ-Y and Γ-P directions are observed in a single ARPES measurement (T = 60 K and photon energy E = 75 eV). e Calculated bands for the 1T′ phase of single-layer WSe₂ along Γ-Y (brown) and Γ-P (green) directions. A downward rigid shift of 130 meV has been added to account for n-doping seen in the experiment. f EDCs from the momentum positions marked with dashed blue and red lines in d