Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions

Liu, Junyang; Zhao, Xiaotao; Zheng, Jueting; Huang, Xiaoyan; Tang, Yongxiang; Wang, Fei; Li, Ruihao; Pi, Jiuchan; Huang, Cancan; Wang, Lin; Yang, Yang; Shi, Jia; Mao, Bing-Wei; Tian, Zhong-Qun; Bryce, Martin R.; Hong, Wenjing

Abstract

The tunneling leakage current will be a major quantum obstacle during miniaturization in the semiconductor industry down to the scale of several nanometers. At this scale, to promote charge transport and overcome the tunneling leakage current between the source and drain terminals, molecular electronic junctions offer opportunities by inserting molecules between these two electrodes. Employing a series of oligo(aryleneethynylene) (OAE) molecules, here we investigate the transition from tunneling leakage current to molecular tunneling in the single-molecule devices using a mechanically controllable break-junction technique, and the transition distances of the OAE molecular junctions were determined and even down to 0.66 nm for OAE2 molecular junction, which demonstrates that the intrinsic charge-transport properties of a single-molecule device can be outstripped from the tunneling leakage current. Consequently, molecular electronic devices show the potential to push the ultimate limit of miniaturization to the scale of several angstroms.

Citation

Liu, J., Zhao, X., Zheng, J., Huang, X., Tang, Y., Wang, F., …Hong, W. (2019). Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions. Chem, 5(2), 390-401. https://doi.org/10.1016/j.chempr.2018.11.002

• Journal Article Type: Article
• Acceptance Date: Nov 2, 2018
• Online Publication Date: Dec 13, 2018
• Publication Date: Feb 14, 2019
• Deposit Date: Feb 21, 2019
• Publicly Available Date: Dec 13, 2019
• Journal: Chem
• Print ISSN: 2451-9308
• Publisher: Cell Press
• Peer Reviewed: Peer Reviewed
• Volume: 5
• Issue: 2
• Pages: 390-401
• DOI: https://doi.org/10.1016/j.chempr.2018.11.002
• Public URL: https://durham-repository.worktribe.com/output/1307455