Figure 1: Crystal structure and Brillouin zone of the Weyl semimetal TaAs.
From: A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class
(a) Body-centred tetragonal structure of TaAs, shown as stacked TaAs layers. An electric polarization is induced due to dimples in the TaAs lattice. (b) Shows top–down views at different vertical positions, emphasizing the fact that the crystal structure is composed of square lattices that are shifted with respect to one another. The arrangement of Ta atoms for each layer (Ta1 to Ta4) is illustrated in (c). (d) High symmetry points are noted as green and red dots in the bulk and the (001) surface Brillouin zones (BZ), respectively.
