Identifying the electron spin resonance of conduction electrons in alkali doped SWCNTs

M. Galambos, G. Fábián, F. Simon, L. Ćirić, L. Forró, L. Korecz, A. Rockenbauer, J. Koltai, V. Zólyomi, Á Rusznyák, J. Kürti, N. M. Nemes, B. Dóra, H. Peterlik, R. Pfeiffer, H. Kuzmany, T. Pichler

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Abstract

We study the electron spin resonance (ESR) signal of pristine and potassium doped SWCNTs. We identify signals of a super-paramagnetic background, a low intensity impurity, and of the conduction electron spin resonance (CESR). The latter only appears upon the alkali atom doping. To identify the CESR signal, we critically assess whether it could come from residual graphitic carbon, which we clearly exclude. We give accurate values for the signal intensities and the corresponding concentration of spins and for the g-factors. The CESR signal intensity allows to determine the density of states on the SWCNT assembly.

Original languageEnglish
Pages (from-to)2760-2763
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume246
Issue number11-12
DOIs
Publication statusPublished - Dec 1 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Galambos, M., Fábián, G., Simon, F., Ćirić, L., Forró, L., Korecz, L., Rockenbauer, A., Koltai, J., Zólyomi, V., Rusznyák, Á., Kürti, J., Nemes, N. M., Dóra, B., Peterlik, H., Pfeiffer, R., Kuzmany, H., & Pichler, T. (2009). Identifying the electron spin resonance of conduction electrons in alkali doped SWCNTs. Physica Status Solidi (B) Basic Research, 246(11-12), 2760-2763. https://doi.org/10.1002/pssb.200982330