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

We study the electron spin resonance (ESR) signal of pristine and potassium doped SWCNTs. We identify signals of a superparamagnetic 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. (C) 2009 WILEY-VCH Verlaq GmbH & Co. KGaA, Weinheim


Published in:
Physica Status Solidi B-Basic Solid State Physics, 246, 2760-2763
Presented at:
23rd Winterschool on Electronic Properties of Novel Materials, Kirchberg, GERMANY, Mar 14, 2009
Year:
2009
Keywords:
Laboratories:




 Record created 2010-11-30, last modified 2018-09-13


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