Electron scattering by Friedel oscillations in carbon nanotubes
Multi-walled carbon nanotube networks were confirmed to exhibit a linear decrease in resistivity with increasing temperature from 100 to above 400 K. The linearity was explained using a defect scattering model that involved Friedel oscillations (that is, electron-electron interactions). The applicab...
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Veröffentlicht in: | Nano research 2022-02, Vol.15 (2), p.889-897 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Multi-walled carbon nanotube networks were confirmed to exhibit a linear decrease in resistivity with increasing temperature from 100 to above 400 K. The linearity was explained using a defect scattering model that involved Friedel oscillations (that is, electron-electron interactions). The applicability of this model, which was originally proposed for graphene, to carbon nanotubes was assessed based on a comparison of various experimental data. Increases in the slopes of the resistivity-temperature plots following the introduction of defects, as well as an effect of charge concentration on the slope were key predictions of this model. The results obtained from few-walled carbon nanotube networks are also shown. In the literature, linear resistivity-temperature plots were obtained from other graphene derivatives, indicating that the linearity originates from the hexagonal symmetry of these materials. The present work also indicated a relationship between the appearance of linearity and negative magnetoresistance above 100 K. Based on a mechanism incorporating scattering in association with Friedel oscillations and conventional electron conduction models, the universality of resistivity-temperature plots obtained from carbon nanotube networks is introduced. |
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ISSN: | 1998-0124 1998-0000 |
DOI: | 10.1007/s12274-021-3571-0 |