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Switching Quantum Interference in Single-Molecule Junctions by Mechanical Tuning |
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| Authors: | Yixuan Zhu Yu Zhou Lu Ren Jingyao Ye Haichuan Wang Xinyuan Liu Ruiyun Huang Haojie Liu Junyang Liu Jia Shi Peng Gao Wenjing Hong |
| Affiliation: | 1. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China These authors contributed equally to this work.;2. Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021 China Northwest Engineering Corporation Limited, Power China, Xi'an, 710065 China University of Chinese Academy of Sciences, Beijing, 100049 P. R. China These authors contributed equally to this work.;3. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China;4. Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021 China |
| Abstract: | The charge transport through single-molecule electronic devices can be controlled mechanically by changing the molecular geometrical configuration in situ, but the tunable conductance range is typically less than two orders of magnitude. Herein, we proposed a new mechanical tuning strategy to control the charge transport through the single-molecule junctions via switching quantum interference patterns. By designing molecules with multiple anchoring groups, we switched the electron transport between the constructive quantum interference (CQI) pathway and the destructive quantum interference (DQI) pathway, and more than four orders of magnitude conductance variation can be achieved by shifting the electrodes in a range of about 0.6 nm, which is the highest conductance range ever achieved using mechanical tuning. |
| Keywords: | Conductance Mechanical Tuning Molecular Junction Quantum Interference Single Molecule |