Quasi-One-Dimensional Higher-Order Topological Insulators

Chiho Yoon, Cheng-Cheng Liu, Hongki Min +1

Quasi-1D materials Bi${}_4$X${}_4$ (X=Br,I) are prototype weak topological insulators (TI) in the $\beta$ phase. For the $\alpha$ phases, recent high-throughput database screening suggests…