▎ 摘 要
We show that the magnetically induced waveguide in graphene leads to strong confinement of Dirac fermions, regardless of its edge terminations. The proposed waveguide indeed acts as a ballistic conductor and produces well-localized current density and stepwise increasing conductance. Furthermore, when the waveguide is modulated by a magnetic barrier in a small region, its transport properties are dramatically changed. The conductance now exhibits characteristic oscillatory increases as a function of fermion energy. The results of the modified waveguide may provide the applications of graphene-based transport devices.