We investigate electron transport in a ${\mathrm{CrI}}_3/\mathrm{BAs}$ moiré superlattice-based ribbon device. In terms of the effective moiré potential model, we calculate the ribbon conductance in two-terminal or four-terminal devices and discover some unconventional transport properties. As the period of the moiré superlattice increases, the system displays multiple transport gaps corresponding to the isolated narrow subbands emerging in the system, while the miniband conductance peak and its width drop significantly. When a strong perpendicular magnetic field is applied to the planar device, the Landau levels do not emerge in the miniband but persist in the miniband gap as well as in other subgaps. The miniband conductance is very vulnerable to disorder and can even be suppressed totally by weak disorder, while electrons near the subgaps exhibit a delocalization behavior. In a four-terminal device, a weak Hall-like voltage drop is demonstrated to emerge due to the anisotropic scattering of electrons from the moiré potential.

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• Electrical properties
• Electronic structure
• Flat bands
• Landau levels
• Transport phenomena