Gate controlling of quantum interference and direct observation of anti-resonances in single molecule charge transport

Yueqi Li, Marius Buerkle, Guangfeng Li, Ali Rostamian, Hui Wang, Zixiao Wang, David R. Bowler, Tsuyoshi Miyazaki, Limin Xiang, Yoshihiro Asai, Gang Zhou, Nongjian Tao

Research output: Contribution to journalArticle

27 Scopus citations

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.

Original languageEnglish (US)
JournalNature materials
DOIs
StatePublished - Jan 1 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Li, Y., Buerkle, M., Li, G., Rostamian, A., Wang, H., Wang, Z., Bowler, D. R., Miyazaki, T., Xiang, L., Asai, Y., Zhou, G., & Tao, N. (2019). Gate controlling of quantum interference and direct observation of anti-resonances in single molecule charge transport. Nature materials. https://doi.org/10.1038/s41563-018-0280-5