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Abstract: The magnetoelectronic properties of one-dimensional AB-stacked bilayer zigzag graphene nanoribbons are investigated by the Peierls tight-binding model. The competition between magnetic and quantum confinement effects induces quasi-Landau levels (QLLs). The interlayer interactions lead to two groups of QLLs, asymmetry of conduction and valence QLLs about the Fermi level, and splitting of the degenerate partial flat bands. The density of states exhibiting many prominent peaks, corresponding to QLLs, could be verified by experiments. [Copyright &y& Elsevier]

Abstract: Magnetic bands of the hydrogen-terminated monolayer zigzag graphene ribbon subject to the spatially inhomogeneous magnetic field () are investigated through the Peierls-coupling tight-binding model. is a constant magnetic field defined on a strip of finite width that is smaller than the ribbon width. , step-function-like magnetic field, can change band shapes, alter band curvature, shift band edge states, and hybridize parabolic bands, sublinear bands, partial Landau levels, and Hall edge states. Such a not only induces Landau levels in the magnetic field but also modifies the parabolic bands along the boundary between the magnetic and nonmagnetic areas. The magnetic bands are strongly dependent on the configuration of the spatially inhomogeneous magnetic field. Density of states, e.g., the position, height and number of dominant strong peaks, feature such interesting characteristics. [Copyright &y& Elsevier]

Abstract: Magnetoelectronic structures of the AA- and AB-stacked nanographite ribbons, which strongly depend on magnitude and direction of magnetic field, ribbon edges, and interribbon interactions, are studied within the frame of tight-binding model. First, the origins of Landau subbands and additional spectra, induced by the perpendicular magnetic field , chiefly changing the intraribbon interaction, are analytically studied in the zigzag systems. This method allows us to intuitively understand the magnetoband structures of the finite size systems. Then, the interribbon interactions modify Landau subbands and change energy dispersions, energy spacing, bandwidth and oscillation period of Landau subbands. On the other hand, the parallel magnetic field changes the interribbon interactions and leads to the Landau levels along . Furthermore, can induce the metal–insulator transition in the AB-stacked armchair ribbons. Above all, magnetic field and interribbon interactions vitalize the magnetoband structures. So, there are rich structures in density of states: sharp peaks, square-root peaks, logarithmic divergences and oscillating structures. Finally, DOS can clearly exhibit 0D, 1D and 2D characteristics. And this specific is expected to have great effects on the physical properties, e.g. optical, magnetic and transport properties, of the stacked ribbons. [Copyright &y& Elsevier]