A two-dimensional semimetal is featured by its low energy physics near the degeneracy points, while the topology over the whole Brillouin zone is rarely studied. The authors find that the Brillouin zone of the C4zT symmetric semimetal is partitioned into two patches characterized by half quantized Berry curvature fluxes with opposite signs, accompanied by the topological transport phenomena.
- Jin-Yu Zou
- Bo Fu
- Shun-Qing Shen