On resonant scatterers as a factor limiting carrier mobility in graphene.
Nano Lett
; 10(10): 3868-72, 2010 Oct 13.
Article
em En
| MEDLINE
| ID: mdl-20795655
ABSTRACT
We show that graphene deposited on a substrate has a non-negligible density of atomic scale defects. This is evidenced by a previously unnoticed D peak in the Raman spectra with intensity of â¼1% with respect to the G peak. We evaluated the effect of such impurities on electron transport by mimicking them with hydrogen adsorbates and measuring the induced changes in both mobility and Raman intensity. If the intervalley scatterers responsible for the D peak are monovalent, their concentration is sufficient to account for the limited mobilities currently achievable in graphene on a substrate.
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MEDLINE
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En
Ano de publicação:
2010
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Article