Electrically induced ambipolar spin vanishments in carbon nanotubes

D. Matsumoto, K. Yanagi, T. Takenobu, S. Okada, K. Marumoto

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Carbon nanotubes (CNTs) exhibit various excellent properties, such as ballistic transport. However, their electrically induced charge carriers and the relation between their spin states and the ballistic transport have not yet been microscopically investigated because of experimental difficulties. Here we show an electron spin resonance (ESR) study of semiconducting single-walled CNT thin films to investigate their spin states and electrically induced charge carriers using transistor structures under device operation. The field-induced ESR technique is suitable for microscopic investigation because it can directly observe spins in the CNTs. We observed a clear correlation between the ESR decrease and the current increase under high charge density conditions, which directly demonstrated electrically induced ambipolar spin vanishments in the CNTs. The result provides a first clear evidence of antimagnetic interactions between spins of electrically induced charge carriers and vacancies in the CNTs. The ambipolar spin vanishments would contribute the improvement of transport properties of CNTs because of greatly reduced carrier scatterings.

    Original languageEnglish
    Article number11859
    JournalScientific Reports
    Volume5
    DOIs
    Publication statusPublished - 2015 Jul 7

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    carbon nanotubes
    charge carriers
    electron paramagnetic resonance
    ballistics
    transistors
    transport properties
    thin films
    scattering
    interactions

    ASJC Scopus subject areas

    • General

    Cite this

    Matsumoto, D., Yanagi, K., Takenobu, T., Okada, S., & Marumoto, K. (2015). Electrically induced ambipolar spin vanishments in carbon nanotubes. Scientific Reports, 5, [11859]. https://doi.org/10.1038/srep11859

    Electrically induced ambipolar spin vanishments in carbon nanotubes. / Matsumoto, D.; Yanagi, K.; Takenobu, T.; Okada, S.; Marumoto, K.

    In: Scientific Reports, Vol. 5, 11859, 07.07.2015.

    Research output: Contribution to journalArticle

    Matsumoto, D, Yanagi, K, Takenobu, T, Okada, S & Marumoto, K 2015, 'Electrically induced ambipolar spin vanishments in carbon nanotubes', Scientific Reports, vol. 5, 11859. https://doi.org/10.1038/srep11859
    Matsumoto D, Yanagi K, Takenobu T, Okada S, Marumoto K. Electrically induced ambipolar spin vanishments in carbon nanotubes. Scientific Reports. 2015 Jul 7;5. 11859. https://doi.org/10.1038/srep11859
    Matsumoto, D. ; Yanagi, K. ; Takenobu, T. ; Okada, S. ; Marumoto, K. / Electrically induced ambipolar spin vanishments in carbon nanotubes. In: Scientific Reports. 2015 ; Vol. 5.
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