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Mitchell AK, Pedersen KGL, Hedegård P, et al. Kondo blockade due to quantum interference in single-molecule junctions. Nat Commun. 2017;8:15210doi: 10.1038/ncomms15210.
Mitchell, A. K., Pedersen, K. G. L., Hedegård, P., & Paaske, J. (2017). Kondo blockade due to quantum interference in single-molecule junctions. Nature communications, 815210. https://doi.org/10.1038/ncomms15210
Mitchell, Andrew K, et al. "Kondo blockade due to quantum interference in single-molecule junctions." Nature communications vol. 8 (2017): 15210. doi: https://doi.org/10.1038/ncomms15210
Mitchell AK, Pedersen KGL, Hedegård P, Paaske J. Kondo blockade due to quantum interference in single-molecule junctions. Nat Commun. 2017 May 11;8:15210. doi: 10.1038/ncomms15210. PMID: 28492236; PMCID: PMC5437279.
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Nat Commun. 2017 May 11;8:15210. doi: 10.1038/ncomms15210.

Kondo blockade due to quantum interference in single-molecule junctions.

Nature communications

Andrew K Mitchell, Kim G L Pedersen, Per Hedegård, Jens Paaske

Affiliations

  1. School of Physics, University College Dublin, Dublin 4, Ireland.
  2. Institute for Theoretical Physics, Utrecht University, Princetonplein 5, Utrecht 3584 CE, The Netherlands.
  3. Institut für Theorie der Statistischen Physik, RWTH Aachen University, Aachen 52074, Germany.
  4. Niels Bohr Institute, University of Copenhagen, Copenhagen DK-2100, Denmark.
  5. Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, Copenhagen DK-2100, Denmark.

PMID: 28492236 PMCID: PMC5437279 DOI: 10.1038/ncomms15210

Abstract

Molecular electronics offers unique scientific and technological possibilities, resulting from both the nanometre scale of the devices and their reproducible chemical complexity. Two fundamental yet different effects, with no classical analogue, have been demonstrated experimentally in single-molecule junctions: quantum interference due to competing electron transport pathways, and the Kondo effect due to entanglement from strong electronic interactions. Here we unify these phenomena, showing that transport through a spin-degenerate molecule can be either enhanced or blocked by Kondo correlations, depending on molecular structure, contacting geometry and applied gate voltages. An exact framework is developed, in terms of which the quantum interference properties of interacting molecular junctions can be systematically studied and understood. We prove that an exact Kondo-mediated conductance node results from destructive interference in exchange-cotunneling. Nonstandard temperature dependences and gate-tunable conductance peaks/nodes are demonstrated for prototypical molecular junctions, illustrating the intricate interplay of quantum effects beyond the single-orbital paradigm.

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