Fig. 2
From: Tunable 3D/2D magnetism in the (MnBi2Te4)(Bi2Te3)m topological insulators family
a, d ARPES dispersion relations for the large energy and momentum region of MnBi4Te7 and MnBi6Te10 taken at 60 K at a photon energy of 50 eV. b, e ARPES dispersion relations of the Dirac cone region taken at a photon energy of 30 eV at 60 K (BCB (BVB) denotes bulk conduction (valence) band). c DFT-calculated layer-resolved electronic structure of the MnBi4Te7(0001) surface. The size of color circles reflects the weight of the state in the topmost block of the SL (green) and QL (blue) termination. The orange circles show the contribution of the subsurface SL block of the QL termination. The gray shadings correspond to the bulk bandstructure projected onto the 2D Brillouin zone. f The same for MnBi6Te10(0001) surface, the size of green, blue, and red circles reflects the weight of the state in the topmost block of the 7-5-5-, 5-7-5-, and 5-5-7- terminations, respectively.
