Anomalous electron spin resonance behavior of single-walled carbon nanotubes

J. P. Salvetat, T. Fehér, C. L'Huillier, F. Beuneu, L. Forró

Research output: Article

46 Citations (Scopus)

Abstract

We have studied the electron spin resonance (ESR) of single-walled carbon nanotubes (SWNTs) both in their pristine state and after irradiation with fast electrons in order to detect the signal of conduction electrons. No metallic Pauli contribution was observed in the global spin susceptibility, the ESR signal of the conduction electrons is undetectable because it is broadened by magnetic impurities. We measured a paramagnetic contribution from localized states, with an effective Curie constant decreasing when the temperature increases, following a deactivation law of the type A-B exp (- Ea/kB T). This behavior is supposed to be characteristic of semiconducting SWNTs interacting with metallic impurities from the catalyst.

Original languageEnglish
Article number075440
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number7
DOIs
Publication statusPublished - aug. 15 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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