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Redox-Induced Gating of the Exchange Interactions in a Single Organic Diradical.

Authors
  • Gaudenzi, Rocco1
  • de Bruijckere, Joeri1
  • Reta, Daniel2
  • Moreira, Ibério de P R2
  • Rovira, Concepció3
  • Veciana, Jaume3
  • van der Zant, Herre S J1
  • Burzurí, Enrique1
  • 1 Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The Netherlands. , (Netherlands)
  • 2 Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona , C/Martı́ i Franquès 1, 08028 Barcelona, Spain. , (Spain)
  • 3 Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN , Campus de la UAB, 08193, Bellaterra, Spain. , (Spain)
Type
Published Article
Journal
ACS Nano
Publisher
American Chemical Society
Publication Date
Jun 27, 2017
Volume
11
Issue
6
Pages
5879–5883
Identifiers
DOI: 10.1021/acsnano.7b01578
PMID: 28494146
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Embedding a magnetic electroactive molecule in a three-terminal junction allows for the fast and local electric field control of magnetic properties desirable in spintronic devices and quantum gates. Here, we provide an example of this control through the reversible and stable charging of a single all-organic neutral diradical molecule. By means of inelastic electron tunnel spectroscopy we show that the added electron occupies a molecular orbital distinct from those containing the two radical electrons, forming a spin system with three antiferromagnetically coupled spins. Changing the redox state of the molecule therefore switches on and off a parallel exchange path between the two radical spins through the added electron. This electrically controlled gating of the intramolecular magnetic interactions constitutes an essential ingredient of a single-molecule [Formula: see text] quantum gate.

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