Electron transport through honeycomb lattice ribbons with armchair edges

Details Electron transport through honeycomb lattice ribbons with armchair edges Electron transport through honeycomb lattice ribbons with armchair edges

2009-01-21

arxiv.org/abs/0901.3238v1

Solid State Communications, Volume 149, Issues 25-26, July 2009, Pages 973-977

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures

Scientific paper

10.1016/j.ssc.2009.04.019

We address electron transport in honeycomb lattice ribbons with armchair edges attached to two semi-infinite one-dimensional metallic electrodes within the tight-binding framework. Here we present numerically the conductance-energy and current-voltage characteristics as functions of the length and width of the ribbons. Our theoretical results predict that for a ribbon with much smaller length and width, so-called a nanoribbon, a gap in the conductance spectrum appears across the energy E=0. While, this gap decreases gradually with the increase of the size of the ribbon, and eventually it almost vanishes. This reveals a transformation from the semiconducting to the conducting material, and it becomes much more clearly visible from our presented current-voltage characteristics.

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