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

Research output: Contribution to journalJournal article

Published

  • M. Galambos
  • G. Fabian
  • F. Simon
  • L. Ciric
  • L. Forro
  • L. Korecz
  • A. Rockenbauer
  • J. Koltai
  • V. Zolyomi
  • A. Rusznyak
  • J. Kurti
  • N. M. Nemes
  • B. Dora
  • H. Peterlik
  • R. Pfeiffer
  • H. Kuzmany
  • T. Pichler
Journal publication date1/12/2009
Journalphysica status solidi (b)
Journal number11-12
Volume246
Number of pages4
Pages2760-2763
Original languageEnglish

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.

Bibliographic note

23rd Winterschool on Electronic Properties of Novel Materials, Kirchberg, GERMANY, MAR 14, 2009