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Quasi-Dirac points (QDPs) with energy different from the traditional Dirac points (TDPs) have been found for the first time in one-dimensional graphene superlattices. The angular-averaged conductance reaches a minimum value at the QDPs, at which the Fano factor approaches 1/3. Surprisingly, the minimum conductance at these QDPs may be lower than that at the TDPs under certain conditions. This is remarkable...
Zigzag phosphorene ribbons can accommodate degenerate edge states that decay from edge to bulk. The electronic structure of phosphorene ribbons, both the bulk bands and the edge bands, can be tuned by normally applying an electric field. The electrical field enlarges the energy gap parabolically, which is a second order perturbation effect. The external field as a first order perturbation lifts the...
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