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Gehring P, Sowa JK, Cremers J, et al. Distinguishing Lead and Molecule States in Graphene-Based Single-Electron Transistors. ACS Nano. 2017;11(6):5325-5331doi: 10.1021/acsnano.7b00570.
Gehring, P., Sowa, J. K., Cremers, J., Wu, Q., Sadeghi, H., Sheng, Y., Warner, J. H., Lambert, C. J., Briggs, G. A. D., & Mol, J. A. (2017). Distinguishing Lead and Molecule States in Graphene-Based Single-Electron Transistors. ACS nano, 11(6), 5325-5331. https://doi.org/10.1021/acsnano.7b00570
Gehring, Pascal, et al. "Distinguishing Lead and Molecule States in Graphene-Based Single-Electron Transistors." ACS nano vol. 11,6 (2017): 5325-5331. doi: https://doi.org/10.1021/acsnano.7b00570
Gehring P, Sowa JK, Cremers J, Wu Q, Sadeghi H, Sheng Y, Warner JH, Lambert CJ, Briggs GAD, Mol JA. Distinguishing Lead and Molecule States in Graphene-Based Single-Electron Transistors. ACS Nano. 2017 Jun 27;11(6):5325-5331. doi: 10.1021/acsnano.7b00570. Epub 2017 Apr 21. PMID: 28423272; PMCID: PMC5492215.
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ACS Nano. 2017 Jun 27;11(6):5325-5331. doi: 10.1021/acsnano.7b00570. Epub 2017 Apr 21.

Distinguishing Lead and Molecule States in Graphene-Based Single-Electron Transistors.

ACS nano

Pascal Gehring, Jakub K Sowa, Jonathan Cremers, Qingqing Wu, Hatef Sadeghi, Yuewen Sheng, Jamie H Warner, Colin J Lambert, G Andrew D Briggs, Jan A Mol

Affiliations

  1. Department of Materials, University of Oxford , 16 Parks Road, Oxford OX1 3PH, U.K.
  2. Department of Chemistry, University of Oxford, Chemistry Research Laboratory , Mansfield Road, Oxford OX1 3TA, U.K.
  3. Department of Physics, Lancaster University , Bailrigg, Lancaster LA1 4YB, U.K.

PMID: 28423272 PMCID: PMC5492215 DOI: 10.1021/acsnano.7b00570

Abstract

Graphene provides a two-dimensional platform for contacting individual molecules, which enables transport spectroscopy of molecular orbital, spin, and vibrational states. Here we report single-electron tunneling through a molecule that has been anchored to two graphene leads. Quantum interference within the graphene leads gives rise to an energy-dependent transmission and fluctuations in the sequential tunnel-rates. The lead states are electrostatically tuned by a global back-gate, resulting in a distinct pattern of varying intensity in the measured conductance maps. This pattern could potentially obscure transport features that are intrinsic to the molecule under investigation. Using ensemble averaged magneto-conductance measurements, lead and molecule states are disentangled, enabling spectroscopic investigation of the single molecule.

Keywords: graphene; molecular electronics; nanoelectrodes; single-electron tunneling

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