Group theory study of the vibrational modes and magnetic order in the topological antiferromagnet MnBi${}_2$Te${}_4$

Martin Rodriguez-Vega, A. Leonardo, Gregory A. Fiete

We employ group theory to study the properties of the lattice vibrations and magnetic order in the antiferromagnetic topological insulator MnBi${}_2$Te${}_4$, both in bulk and few-laye…