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Conductance fluctuations as a function of sliding motion in bilayer graphene nanoribbon junction: A first-principles investigation
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10.1063/1.4739838
/content/aip/journal/apl/101/8/10.1063/1.4739838
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/8/10.1063/1.4739838
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The band structures of the 7-AGNRB with different interlayer configuration. The inset in each panel is the primitive cell of the 7-AGNRB, where black layer is fixed and the red one slides on it, in each panel the red layer moves ahead a half of C-C bonding length from the previous configuration.

Image of FIG. 2.
FIG. 2.

The schematic illustration of (a) the bilayer graphene based strain sensor and geometry configuration of the junction (b) side view, and (c) top view.

Image of FIG. 3.
FIG. 3.

I-V curves of junctions with different interlayer sliding displacement under 2 V bias, a0 equals twice of the C-C bonding length.

Image of FIG. 4.
FIG. 4.

(a) Band structure of the 7-AGNR lead (left panel), and transmission curve (right panel), for initial AB stacked junction at zero bias, between the green lines is the band gap of 7-AGNR lead, red dashed lines mark the position of some MPSHs of the junction. (b) Transmission spectrums of all junctions under 2 V bias, the right axis in horizontal plane marks each line to a interlayer sliding displacement, that is the configuration of the junction. (c) Band structure of the left 7-AGNR lead (left panel) and of the right 7-AGNR lead (right panel), and transmission curve (middle panel), for initial AB stacked junction at 2 V bias, between the green lines is the overlapped range of left and right lead band. (d) The isosurface plot of the wave functions of valence band (VB and VB-1) and conduction band (CB and CB + 1) for 7-AGNR lead.

Image of FIG. 5.
FIG. 5.

(a) HOMO and LUMO position of junctions with different interlayer sliding displacement under 2 V bias, between the two red dot lines is the overlapped range of left and right lead band. (b) The isosurface plots of the wave functions of HOMO and LUMO of some junctions, the details of each plot is at the bottom of the panel, such as 0.25a0-2 V-HOMO means that the plot is HOMO of the bilayer junction under 2 V bias, and 0.25a0 represents the interlayer sliding displacement of the junction is 0.5 times of the C-C bonding length.

Image of FIG. 6.
FIG. 6.

I-V curves of junctions with different interlayer sliding displacement (a) 15-AGNRB junction under 2 V bias, and a0 equals twice of the C-C bonding length; (b) 12-ZGNRB junction, and a1 equals /2 of the C-C bonding length; and (c) Transmission spectrums of all 12-ZGNRB junctions under 2 V bias, the right axis in horizontal plane marks each line to a interlayer sliding displacement, that is correspondent to horizontal axis of (b).

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/content/aip/journal/apl/101/8/10.1063/1.4739838
2012-08-20
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Conductance fluctuations as a function of sliding motion in bilayer graphene nanoribbon junction: A first-principles investigation
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/8/10.1063/1.4739838
10.1063/1.4739838
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