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Induced electric conductivity in organic polymers.

Konstantin Yu Arutyunov1,2, Anatoli S Gurski1, Vladimir V Artemov3

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This study explores the electrical properties of poly(diphenylene phthalide) (PDP) thin films. At low temperatures, PDP films show potential induced superconductivity when placed between lead superconductors.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Polymer Science

Background:

  • Poly(diphenylene phthalide) (PDP) is a carbocyclic organic electroactive polymer.
  • PDP exhibits electrical conductivity under external stimuli like electric fields or mechanical stress.

Purpose of the Study:

  • To experimentally investigate the charge transport properties of thin-film layered lead-PDP-lead structures.
  • To explore the behavior of PDP at a wide range of temperatures, including cryogenic conditions.

Main Methods:

  • Fabrication of thin-film layered structures using lead and PDP.
  • Experimental measurement of current-voltage characteristics across a wide temperature spectrum.
  • Analysis of transport properties using space-charge-limited current injection models.

Main Results:

  • At high temperatures, current-voltage characteristics align with the space-charge-limited current injection model.
  • At temperatures below approximately 8 K, samples display unique features.
  • These low-temperature features suggest induced superconductivity in the PDP film due to adjacent lead superconductors.

Conclusions:

  • The transport properties of lead-PDP-lead structures are temperature-dependent.
  • PDP exhibits characteristics consistent with space-charge-limited currents at higher temperatures.
  • Evidence points towards induced superconductivity in PDP thin films at cryogenic temperatures when interfaced with lead.