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Switching Voltage in a Carbon Nanotube Memory Device

  • Paul von Allmen (a1), Trinh Vo (a2), Krikor Megerian (a3), Richard Baron (a4) and Anupama B Kaul (a5)...

Abstract

Multi-wall carbon nanotubes (MWNT) have stable elastic properties over a wide range of deformation amplitudes and their high polarizability is conducive to efficient bending in the inhomogeneous electric field close to patterned electrodes. We simulate the static switching properties of the MWNT using a custom NEMS simulation package. The MWNT is modeled as a solid cylinder with Young�s modulus taken in a range consistent with recent experimental data in the literature. The polarizability of the MWNT is obtained from empirical expressions in the literature. The static equilibrium equations for the bending of the MWNT in an electric field are solved for realistic geometry of the electrodes. The spatial distribution of electric field distribution in the vicinity of the tubes and the electrodes is obtained from a finite element solution of the Poisson equation. A Monte Carlo approach yields the switching voltage as a function of MWNT mechanical properties and electrode geometry, where a Gaussian distribution is assumed for the parametric variations.

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1. Kaul, Anupama B., Paul Khan, Andrew Jennings, T., Julia Greer, A., Krikor Megerian, G. and Allmen, Paul von, Proceedings of the MRS Spring Meeting 2009.
2. Kaul, Anupama B., Megerian, Krikor G., Allmen, Paul von and Baron, Richard L., Nanotechnology 20, 075303 (2009).10.1088/0957-4484/20/7/075303
3. Benedict, Lorin X., Louie, Steven G. and Cohen, Mavin L., Phys. Rev. B 52, 8541 (1995).10.1103/PhysRevB.52.8541
4. Kozinsky, Boris and Marzari, Nicola, Phys. Rev. Lett. 96, 166801 (2006).10.1103/PhysRevLett.96.166801
5.Course of Theoretical Physics: Mechanics, Landau, L. D. and Lifshitz, E.M., Pergamon 3rd Edition (2003).

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Switching Voltage in a Carbon Nanotube Memory Device

  • Paul von Allmen (a1), Trinh Vo (a2), Krikor Megerian (a3), Richard Baron (a4) and Anupama B Kaul (a5)...

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