Negative Differential Resistance and Rectifying Effects of Diblock Co-Oligomer Molecule Devices Sandwiched between C$_{2}$N-$h$2D Electrodes
Meng Ye, Cai-Juan Xia** , Bo-Qun Zhang, Yue Ma
School of Science, Xi'an Polytechnic University, Xi'an 710048
Abstract ：Based on nonequilibrium Green's function method in combination with density functional theory, we study the electronic transport properties of dipyrimidinyl-diphenyl molecules embedded in a carbon atomic chain sandwiched between zigzag graphene nanoribbon and different edge geometries C$_{2}$N-$h$2D electrodes. Compared with the graphene electrodes, the C$_{2}$N-$h$2D electrode can cause rectifying and negative differential resistance effects. For C$_{2}$N-$h$2D with zigzag edges, a more remarkable negative differential resistance phenomenon appears, whereas armchair-edged C$_{2}$N-$h$2D can give rise to much better rectifying behavior. These results suggest that this system can be potentially useful for designs of logic and memory devices.
收稿日期: 2018-12-24
出版日期: 2019-03-23
:
71.15.Mb
(Density functional theory, local density approximation, gradient and other corrections)
73.23.-b
(Electronic transport in mesoscopic systems)
85.65.+h
(Molecular electronic devices)
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2019, Vol. 36 
