Robust A-type order and spin-flop transition on the surface of the antiferromagnetic topological insulator MnBi${}_2$Te${}_4$

Paul M. Sass, Jinwoong Kim, David Vanderbilt +2

Here we present microscopic evidence of the persistence of uniaxial A-type antiferromagnetic order to the surface layers of MnBi${}_2$Te${}_4$ single crystals using magnetic force micr…