by Szirmai, Péter, Fábián, Gábor, Dóra, Balázs, Koltai, János, Zólyomi, Viktor, Kürti, Jenő, Nemes, Norbert M., Forró, László and Simon, Ferenc
Abstract:
Electron spin resonance (ESR) spectroscopy is an important tool to characterize the ground state of conduction electrons and to measure their spin-relaxation times. Observing ESR of the itinerant electrons is thus of great importance in graphene and in single-wall carbon nanotubes. Often, the identification of CESR signal is based on two facts: the apparent asymmetry of the ESR signal (known as a Dysonian lineshape) and on the temperature independence of the ESR signal intensity. We argue that these are insufficient as benchmarks and instead the ESR signal intensity (when calibrated against an intensity reference) yields an accurate characterization. We detail the method to obtain the density of states from an ESR signal, which can be compared with theoretical estimates. We demonstrate the success of the method for K doped graphite powder. We give a benchmark for the observation of ESR in graphene.
Reference:
Density of states deduced from ESR measurements on low-dimensional nanostructures; benchmarks to identify the ESR signals of graphene and SWCNTs (Szirmai, Péter, Fábián, Gábor, Dóra, Balázs, Koltai, János, Zólyomi, Viktor, Kürti, Jenő, Nemes, Norbert M., Forró, László and Simon, Ferenc), In physica status solidi (b), volume 248, 2011.
Bibtex Entry:
@article{szirmai_density_2011,
title = {Density of states deduced from {ESR} measurements on low-dimensional nanostructures; benchmarks to identify the {ESR} signals of graphene and {SWCNTs}},
volume = {248},
copyright = {Copyright © 2011 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim},
issn = {1521-3951},
url = {http://onlinelibrary.wiley.com/doi/10.1002/pssb.201100191/abstract},
doi = {10.1002/pssb.201100191},
abstract = {Electron spin resonance (ESR) spectroscopy is an important tool to characterize the ground state of conduction electrons and to measure their spin-relaxation times. Observing ESR of the itinerant electrons is thus of great importance in graphene and in single-wall carbon nanotubes. Often, the identification of CESR signal is based on two facts: the apparent asymmetry of the ESR signal (known as a Dysonian lineshape) and on the temperature independence of the ESR signal intensity. We argue that these are insufficient as benchmarks and instead the ESR signal intensity (when calibrated against an intensity reference) yields an accurate characterization. We detail the method to obtain the density of states from an ESR signal, which can be compared with theoretical estimates. We demonstrate the success of the method for K doped graphite powder. We give a benchmark for the observation of ESR in graphene.},
language = {en},
number = {11},
urldate = {2013-05-07},
journal = {physica status solidi (b)},
author = {Szirmai, Péter and Fábián, Gábor and Dóra, Balázs and Koltai, János and Zólyomi, Viktor and Kürti, Jenő and Nemes, Norbert M. and Forró, László and Simon, Ferenc},
year = {2011},
keywords = {carbon nanotubes, electron spin resonance, graphene, Pauli susceptibility, spin-decoherence, spin life-time, spintronics},
pages = {2688--2691},
file = {Snapshot:/home/koltai/.zotero/zotero/e95q5zt4.default/zotero/storage/M3X7N8S2/abstract.html:text/html}
}