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Anti-resonance features of destructive quantum interference in single-molecule thiophene junctions achieved by electrochemical gating
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Bai, Jie, Daaoub, Abdalghani, Sangtarash, Sara, Li, Xiaohui, Tang, Yongxiang, Zou, Qi, Sadeghi, Hatef, Liu, Shuai, Huang, Xiaojuan, Tan, Zhibing, Liu, Junyang, Yang, Yang, Shi, Jia, Mészáros, Gábor, Chen, Wenbo, Lambert, Colin and Hong, Wenjing (2019) Anti-resonance features of destructive quantum interference in single-molecule thiophene junctions achieved by electrochemical gating. Nature Materials, 18 (4). pp. 364-369. doi:10.1038/s41563-018-0265-4
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Official URL: http://dx.doi.org/10.1038/s41563-018-0265-4
Abstract
Controlling the electrical conductance and in particular the occurrence of quantum interference in single-molecule junctions through gating effects has potential for the realization of high-performance functional molecular devices. In this work we used an electrochemically gated, mechanically controllable break junction technique to tune the electronic behaviour of thiophene-based molecular junctions that show destructive quantum interference features. By varying the voltage applied to the electrochemical gate at room temperature, we reached a conductance minimum that provides direct evidence of charge transport controlled by an anti-resonance arising from destructive quantum interference. Our molecular system enables conductance tuning close to two orders of magnitude within the non-faradaic potential region, which is significantly higher than that achieved with molecules not showing destructive quantum interference. Our experimental results, interpreted using quantum transport theory, demonstrate that electrochemical gating is a promising strategy for obtaining improved in situ control over the electrical performance of interference-based molecular devices.
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science > Engineering | ||||||||
| Journal or Publication Title: | Nature Materials | ||||||||
| Publisher: | Nature Publishing Group | ||||||||
| ISSN: | 1476-1122 | ||||||||
| Official Date: | April 2019 | ||||||||
| Dates: |
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| Volume: | 18 | ||||||||
| Number: | 4 | ||||||||
| Page Range: | pp. 364-369 | ||||||||
| DOI: | 10.1038/s41563-018-0265-4 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
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