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- W2561793281 abstract "We study the variation of electronic property for zigzag-edge phosphorene nanoribbons (ZPNRs) under a perpendicular electric field (PEF). Using the tight-binding Hamiltonian combined with the surface lattice Green's function (GF) approach, we show that the response of edge states to PEF for a N-ZPNR with even- or odd-N (number of zigzag chains) is qualitatively different. The field opens a gap between two edge bands near the Fermi energy for even-N ribbons, but for odd-N ones where the two edge bands are always nearly degenerated. This difference is originally from that the Stark-effect-induced energies at the upper and lower edges for even- and odd-N ZPNRs are different due to the peculiar lattice structure of phosphorene. In consequence, the electronic densities are more localized at the edges driven by the field for even-N ZPNRs but not for odd-N ones. This even–odd effect is also reflected in conductance, which indicates that the odd-N ZPNRs may be more suitable for the usage of field-effect transistor." @default.
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- W2561793281 date "2016-12-30" @default.
- W2561793281 modified "2023-10-12" @default.
- W2561793281 title "Even–odd effect on the edge states for zigzag phosphorene nanoribbons under a perpendicular electric field" @default.
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- W2561793281 doi "https://doi.org/10.1088/1361-6463/aa52b5" @default.
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