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Probing long-range carrier-pair spin–spin interactions in a conjugated polymer by detuning of electrically detected spin beating

Author

Listed:
  • Kipp J. van Schooten

    (University of Utah)

  • Douglas L. Baird

    (University of Utah)

  • Mark E. Limes

    (University of Utah)

  • John M. Lupton

    (University of Utah
    Institute of Experimental and Applied Physics, University of Regensburg)

  • Christoph Boehme

    (University of Utah)

Abstract

Weakly coupled electron spin pairs that experience weak spin–orbit interaction can control electronic transitions in molecular and solid-state systems. Known to determine radical pair reactions, they have been invoked to explain phenomena ranging from avian magnetoreception to spin-dependent charge-carrier recombination and transport. Spin pairs exhibit persistent spin coherence, allowing minute magnetic fields to perturb spin precession and thus recombination rates and photoreaction yields, giving rise to a range of magneto-optoelectronic effects in devices. Little is known, however, about interparticle magnetic interactions within such pairs. Here we present pulsed electrically detected electron spin resonance experiments on poly(styrene-sulfonate)-doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) devices, which show how interparticle spin–spin interactions (magnetic-dipolar and spin-exchange) between charge-carrier spin pairs can be probed through the detuning of spin-Rabi oscillations. The deviation from uncoupled precession frequencies quantifies both the exchange (

Suggested Citation

  • Kipp J. van Schooten & Douglas L. Baird & Mark E. Limes & John M. Lupton & Christoph Boehme, 2015. "Probing long-range carrier-pair spin–spin interactions in a conjugated polymer by detuning of electrically detected spin beating," Nature Communications, Nature, vol. 6(1), pages 1-9, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7688
    DOI: 10.1038/ncomms7688
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