Electronic transport decay rule for junction of oligophenylene molecules sandwiched between phosphorene nanoribbons

Jia, Chunxia1,2; Liu, Guang3; Ding, Wence1; Zhou, Benliang1; Zhou, Xiaoying1; Zhou, Guanghui1

2020

10.1088/1361-6463/ab5b5a

Journal of Physics D: Applied Physics   影响因子和分区

13616463

1361-6463

We study the influence of electrodes on the exponential transport rule for the junction of oligophenylene-linked and oligoacene-linked molecules between two zigzag phosphorene nanoribbons (ZPNRs), where molecules consisting of one, two and three benzene rings are considered, respectively. We find by ab initio calculations that the amplitude of current through the junction is dependent on both the molecular length and the molecule-ZPNR coupling manner. In specification, the current through the single-bond coupled junction with the molecular plane perpendicular to the ZPNRs is almost two times that with parallel configuration due to the greater number of transport channels provided by the p y orbital in the former case. In contrast, the current of the junction with double-bond coupling is nearly two orders of magnitude larger because of the stronger coupling strength. Nevertheless, in any case the ZPNR-electrode junction, like metal-electrode junctions, also obeys the exponential decaying rule in transport with the variation of molecular length. Importantly, the relationship between the resistance and the molecular length, regardless of the coupling details, can be fitted by a linear line in the semilog coordinate but with different slopes determined by the coupling manner. This indicates that the exponential rule of transport under small bias voltages is electrode-material-independent for molecular junctions with any electrode. But the value of the decaying factor, importantly, is heavily dependent not only on the molecule itself but also on the electrode materials as well as the molecule-electrode coupling method.
© 2019 IOP Publishing Ltd.

molecular electronic device phosphorene electrodes transport exponential decay rule

EI ; SCI

英语

其他

China Postdoctoral Science Foundation[2019M652777] ; Scientific Research Foundation of Hunan Provincial Education Department[16A124] ; National Natural Science Foundation of China[11704118]

Physics

Physics, Applied

WOS:000524651400002

Institute of Physics Publishing

20200808197177

Calculations ; Molecules ; Nanoribbons

Nanotechnology:761 ; Mathematics:921 ; Atomic and Molecular Physics:931.3

PHYSICS

EV Compendex

1.Department of Physics, Key Laboratory for Low-Dimensional Structures and Quantum Manipulation, Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications of Hunan, Hunan Normal University, Changsha; 410081, China
2.School of Physics, Hunan University of Science and Technology, Xiangtan; 411201, China
3.Department of Physics, Southern University of Science and Technology, Shenzhen; 518055, China

Jia, Chunxia,Liu, Guang,Ding, Wence,et al. Electronic transport decay rule for junction of oligophenylene molecules sandwiched between phosphorene nanoribbons[J]. Journal of Physics D: Applied Physics,2020,53(10).

Jia, Chunxia,Liu, Guang,Ding, Wence,Zhou, Benliang,Zhou, Xiaoying,&Zhou, Guanghui.(2020).Electronic transport decay rule for junction of oligophenylene molecules sandwiched between phosphorene nanoribbons.Journal of Physics D: Applied Physics,53(10).

Jia, Chunxia,et al."Electronic transport decay rule for junction of oligophenylene molecules sandwiched between phosphorene nanoribbons".Journal of Physics D: Applied Physics 53.10(2020).