Título
Observation of magnetic edge state in graphene nanoribbons
Autor
Hiroyuki Muramatsu
JESSICA ROSAURA CAMPOS DELGADO
FLORENTINO LOPEZ URIAS
ANDRES RAFAEL BOTELLO MENDEZ
HUMBERTO TERRONES MALDONADO
MAURICIO TERRONES MALDONADO
Dresselhaus Mildred
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: https://doi.org/10.1103/PhysRevB.81.245428
Resumen o descripción
"The electronic structure and spin magnetism for few-layer-graphene nanoribbons synthesized by chemical vapor deposition have been investigated using near-edge x-ray absorption fine structure (NEXAFS) and electron-spin resonance (ESR). For the pristine sample, a prepeak was observed below the pi* peak close to the Fermi level in NEXAFS, indicating the presence of additional electronic states close to the Fermi level. The intensity of this prepeak decreased with increasing annealing temperature and disappeared after annealing above 1500 degrees C. The ESR spectra, which proved the presence of localized spins, tracked the annealing-temperature-dependent behavior of the prepeak with fidelity. The NEXAFS and ESR results jointly confirm the existence of a magnetic edge state that originates from open nanographene edges. The disappearance of the edge state after annealing at higher temperatures is explained by the decrease in the population of open edges owing to loop formation of adjacent graphene edges."
Editor
American Physical Society
Fecha de publicación
junio de 2010
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Público en general
Sugerencia de citación
Joly, V.L. Joseph, et al. "Observation of magnetic edge state in graphene nanoribbons." Physical Review B 81.24 (2010): 245428. © 2010 The American Physical Society
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