We investigate the confined states and transport of three-dimensional Weylelectrons around a one-dimensional external rectangular electrostaticpotential. Confined states with finite transverse wave vector exist at energieshigher than the half well depth or lower than the half barrier height. Therectangular potential appears completely transparent to normal incidentelectrons but not otherwise. The tunneling transmission coefficient issensitive to their incident angle and shows resonant peaks when their energycoincides with the confined spectra. In addition, for electrons in theconduction (valence) band through a potential barrier (well), the transmissionspectrum has a gap of width increasing with the incident angle. Interestingly,the electron linear zero-temperature conductance over the potential canapproach zero when the Fermi energy is aligned to the top and bottom energiesof the potential, when only electron beams normal to the potential interfacescan pass through. The considered structure can be used to collimate Weylelectron beams.
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