Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4721487
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Funding
- Korea Science and Engineering Foundation (KOSEF) [2008-02807]
- Ministry of Education, Science and Technology
- National Research Foundation (NRF) [2010-0006910]
- National Research Foundation of Korea [2010-0006910, 2008-02807] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Employing open-ended carbon nanotubes (CNTs) with and without hydrogen termination, we study the length scaling of metal-CNT contact resistance and its correlation with chemical bonding from first principles. Both models similarly show a transition from the fast-growing short-length scaling to the slow-growing long-length scaling. However, while the hydrogenated CNTs have much lower short-length resistances than H-free CNTs, Schottky barrier of the former is almost twice thicker and its eventual long-length-limit resistance becomes significantly higher. This demonstrates the critical role of atomistic details in metal-CNT contacts and localized CNT edge states for the Schottky barrier shape and metal-induced gap states. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4721487]
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