Transport in nanoribbon interconnects obtained from graphene grown by chemical vapor deposition |
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Authors: | Ashkan Behnam Austin S Lyons Myung-Ho Bae Edmond K Chow Sharnali Islam Christopher M Neumann Eric Pop |
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Affiliation: | Micro and Nanotechnology Lab, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States. |
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Abstract: | We study graphene nanoribbon (GNR) interconnects obtained from graphene grown by chemical vapor deposition (CVD). We report low- and high-field electrical measurements over a wide temperature range, from 1.7 to 900 K. Room temperature mobilities range from 100 to 500 cm(2)·V(-1)·s(-1), comparable to GNRs from exfoliated graphene, suggesting that bulk defects or grain boundaries play little role in devices smaller than the CVD graphene crystallite size. At high-field, peak current densities are limited by Joule heating, but a small amount of thermal engineering allows us to reach ~2 × 10(9) A/cm(2), the highest reported for nanoscale CVD graphene interconnects. At temperatures below ~5 K, short GNRs act as quantum dots with dimensions comparable to their lengths, highlighting the role of metal contacts in limiting transport. Our study illustrates opportunities for CVD-grown GNRs, while revealing variability and contacts as remaining future challenges. |
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