Charge Transport and Tunneling in Single-Walled Carbon Nanotube Bundles

M. Salvato, M. Cirillo, M. Lucci, S. Orlanducci, I. Ottaviani, M. L. Terranova, and F. Toschi
Phys. Rev. Lett. 101, 246804 – Published 9 December 2008

Abstract

We investigate experimentally the transport properties of single-walled carbon nanotube bundles as a function of temperature and applied current over broad intervals of these variables. The analysis is performed on arrays of nanotube bundles whose axes are aligned along the direction of the externally supplied bias current. The data are found consistent with a charge transport model governed by the tunneling between metallic regions occurring through potential barriers generated by a nanotube’s contact areas or bundle surfaces. Based on this model and on experimental data, we describe quantitatively the dependencies of the height of these barriers upon bias current and temperature.

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  • Received 28 June 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.246804

©2008 American Physical Society

Authors & Affiliations

M. Salvato1,2, M. Cirillo1, M. Lucci1, S. Orlanducci3, I. Ottaviani1, M. L. Terranova3, and F. Toschi3

  • 1Dipartimento di Fisica and MINAS Laboratory, Università di Roma “Tor Vergata,” I-00133 Roma, Italy
  • 2Laboratorio Regionale “Super Mat” CNR-INFM, I-84081, Baronissi, Italy
  • 3Dipartimento di Scienze e Tecnologie Chimiche and MINAS Laboratory, Università di Roma “Tor Vergata,” I-00133 Roma, Italy

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Vol. 101, Iss. 24 — 12 December 2008

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