Fig. 4: Dirac fermions with electrically tunable mass gaps.
From: Experimental electronic structure of the electrically switchable antiferromagnet CuMnAs
a Shows the Y → M → X cut near EF from DFT on the undoped energy scale with spin-orbit coupling included. b, c Zoom in on the dispersion in the red and green boxes shown in (a), respectively, highlighting nearby Dirac fermions. The red circle in (b) shows the closest Dirac point to EF. d ARPES image with hole doped DFT overlaid. Data comes from the CuMnAs01 sample, which has AFM domains with the Néel vector along [1, 1, 0] and \([1,\bar{1},0]\). The black circles highlight the same Dirac points in both (c, d).
