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arXiv · 1105.5672

Approaching the Intrinsic Bandgap in Suspended High-Mobility Graphene Nanoribbons

Ming-Wei Lin·Cheng Ling·Luis A. Agapito·Nicholas Kioussis·Yiyang Zhang·Mark Ming-Cheng Cheng·Wei L. Wang·Efthimios Kaxiras·Zhixian Zhou
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Abstract

We report electrical transport measurements on a suspended ultra-low-disorder graphene nanoribbon(GNR) with nearly atomically smooth edges that reveal a high mobility exceeding 3000 cm2 V-1 s-1 and an intrinsic band gap. The experimentally derived bandgap is in quantitative agreement with the results of our electronic-structure calculations on chiral GNRs with comparable width taking into account the electron-electron interactions, indicating that the origin of the bandgap in non-armchair GNRs is partially due to the magnetic zigzag edges.

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Ming-Wei Lin, Cheng Ling, Luis A. Agapito, Nicholas Kioussis, Yiyang Zhang, Mark Ming-Cheng Cheng, Wei L. Wang, Efthimios Kaxiras, Zhixian Zhou. 2011-05-28. Approaching the Intrinsic Bandgap in Suspended High-Mobility Graphene Nanoribbons. https://doi.org/10.1103/physrevb.84.125411

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