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. 2016 Feb 19;7:10559. doi: 10.1038/ncomms10559

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(a,b) Energy-momentum ARPES dispersions obtained for Mn-doped Bi₂Se₃ epilayers with 8% Mn concentration. The red lines are the energy-distribution curves obtained in normal emission (k_||=0). The horizontal white-dashed lines highlight the surface gap. Measurements are taken at 50 eV photon energy and a temperature of (a) 12 K and (b) 300 K. The surface band gap does not show a remarkable temperature dependence.