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Modification of the gap at the Dirac point (DP) in axion antiferromagnetic topological insulator [Formula see text] and its electronic and spin structure have been studied by angle- and spin-resolved photoemission spectroscopy (ARPES) under laser excitation at various temperatures (9-35 K), light polarizations and photon energies. We have distinguished both large (60-70 meV) and reduced ([Formula see text]) gaps at the DP in the ARPES dispersions, which remain open above the Neél temperature ([Formula see text]). We propose that the gap above [Formula see t
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