Fig. 7: Comparison of the electron transport mechanism in CoSi and NbAs films.
From: Surface-dominated conductance scaling in Weyl semimetal NbAs
Momentum k-resolved transmission for (001)-oriented slabs of a CoSi (3.3-nm thick) and b NbAs (3.4-nm thick) in the presence of different surface line-defects. For the case of CoSi, there is one state per spin whose forward- and backward-moving surface states do not lie on the same surface due to chirality, and hence, their transmission never goes below 2 (accounting for spin degeneracy) as they cannot backscatter. However, the transmission is reduced throughout the Brillouin zone for NbAs since the forward- and backward-moving states lie on the same surface and so are not protected from backscattering.
