Fig. 3: Topological properties of bulk AFM MnBi4Te7 predicted by first-principles calculations.
From: A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling
a Band structure with the projection of Bloch eigenstates onto Bi-p (blue) and Te-p (red) orbitals. SOC is included. b Evolution of Wannier charge centers (WCCs) for kz = 0, indicating a nontrivial topological invariant Z2 = 1. c Surface spectra of (010) side surface, showing a gapless Dirac cone protected by S-symmetry.
