Li, Y;
Buerkle, M;
Li, G;
Rostamian, A;
Wang, H;
Wang, Z;
Bowler, DR;
... Tao, N; + view all
(2019)
Gate controlling of quantum interference and direct observation of anti-resonances in single molecule charge transport.
Nature Materials
, 18
pp. 357-363.
10.1038/s41563-018-0280-5.
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Abstract
Quantum interference can profoundly affect charge transport in single molecules, but experiments can usually measure only the conductance at the Fermi energy. Because, in general, the most pronounced features of the quantum interference are not located at the Fermi energy, it is highly desirable to probe charge transport in a broader energy range. Here, by means of electrochemical gating, we measure the conductance and map the transmission functions of single molecules at and around the Fermi energy, and study signatures associated with constructive and destructive interference. With electrochemical gate control, we tune the quantum interference between the highest occupied molecular orbital and lowest unoccupied molecular orbital, and directly observe anti-resonance, a distinct feature of destructive interference. By tuning the molecule in and out of anti-resonance, we achieve continuous control of the conductance over two orders of magnitude with a subthreshold swing of ~17 mV dec-1, features relevant to high-speed and low-power electronics.
| Type: | Article |
|---|---|
| Title: | Gate controlling of quantum interference and direct observation of anti-resonances in single molecule charge transport |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41563-018-0280-5 |
| Publisher version: | https://doi.org/10.1038/s41563-018-0280-5 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Atomic and molecular physics, Nanoscale devices |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10069215 |
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