Quantum Coherent Transport of 1D ballistic states in second order topological insulator Bi${}_4$Br${}_4$

J. Lefeuvre, M. Kobayashi, G. Patriarche +7

We investigate quantum transport in micrometer-sized single crystals of Bi${}_4$Br${}_4$, a material predicted to be a second-order topological insulator. 1D topological states with lo…