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Analytical Model of Carbon Nanotube Electrostatics: Density of States, Effective Mass, Carrier Density, and Quantum Capacitance

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3 Author(s)
Akinwande, D. ; Stanford Univ., Stanford ; Nishi, Yoshio ; Wong, H.-S.P.

Fundamental electrostatic properties of achiral carbon nanotubes (CNTs) are derived analytically. These include an exact derivation of the density of states within the nearest neighbor tight-binding formalism, the group velocity, and the effective mass. In addition, the non-degenerate equilibrium carrier density, and quantum capacitance are presented analytically. The quantum capacitance is used to provide a low energy C-V theory for a top-gated CNT device with good correlation to experimental data.

Published in:

Electron Devices Meeting, 2007. IEDM 2007. IEEE International

Date of Conference:

10-12 Dec. 2007