Fig. 1
From: Intrinsic magnetic topological insulator phases in the Sb doped MnBi2Te4 bulks and thin flakes
ARPES measurements of the crystal with x = 0. a Crystal structure of the material family. The red arrows indicate the magnetic moment of the manganese atoms. b, c ARPES data of the crystal and the corresponding magnified view near the Dirac point, under a photon energy of 7.25 eV at 8 K. The arrows in b, c indicate the bulk conduction band (BCB), bulk valence band (BVB), and the topological surface states (TSSs), respectively. d Constant-energy maps at binding energies from −0.16 to −0.36 eV (photon energy = 7.25 eV, T = 8 K). e Momentum distribution curves derived from the ARPES spectrum in the dashed rectangle area in c. f The energy distribution curve extracted from the ARPES spectrum in b at k∥ = 0. g Dispersions of the x = 0 crystal under photon energies from 9 to 15 eV
