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A tight-binding Hamiltonian for band structure and carrier transport in graphene nanoribbons

Publication ,  Conference
Finkenstadt, D; Pennington, G; Mehl, MJ
Published in: Materials Research Society Symposium Proceedings
December 1, 2008

To understand nanoribbons of graphene, we developed an ab initio parametrized fit to Carbon and Hydrogen chemical data, out to arbitrary neighbor interactions, including relaxations. Our computed band structure confirms the well-known three-family behavior of armchair band gaps but also predicts a similar familial behavior for conductance in nanoribbon transistors. The Boltzmann carrier transport simulations from calculated phonon spectra show, over a range of temperatures, the familial conductance behavior. Both the peak field-effect mobility and the "on" conductance increase with ribbon width, the later being proportional to the width and inversely proportional to the lattice temperature. We will also discuss phonon-limited scattering of charge carriers in graphene. © 2008 Materials Research Society.

Duke Scholars

Published In

Materials Research Society Symposium Proceedings

ISSN

0272-9172

Publication Date

December 1, 2008

Volume

1057

Start / End Page

18 / 23
 

Citation

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Finkenstadt, D., Pennington, G., & Mehl, M. J. (2008). A tight-binding Hamiltonian for band structure and carrier transport in graphene nanoribbons. In Materials Research Society Symposium Proceedings (Vol. 1057, pp. 18–23).
Finkenstadt, D., G. Pennington, and M. J. Mehl. “A tight-binding Hamiltonian for band structure and carrier transport in graphene nanoribbons.” In Materials Research Society Symposium Proceedings, 1057:18–23, 2008.
Finkenstadt D, Pennington G, Mehl MJ. A tight-binding Hamiltonian for band structure and carrier transport in graphene nanoribbons. In: Materials Research Society Symposium Proceedings. 2008. p. 18–23.
Finkenstadt, D., et al. “A tight-binding Hamiltonian for band structure and carrier transport in graphene nanoribbons.” Materials Research Society Symposium Proceedings, vol. 1057, 2008, pp. 18–23.
Finkenstadt D, Pennington G, Mehl MJ. A tight-binding Hamiltonian for band structure and carrier transport in graphene nanoribbons. Materials Research Society Symposium Proceedings. 2008. p. 18–23.

Published In

Materials Research Society Symposium Proceedings

ISSN

0272-9172

Publication Date

December 1, 2008

Volume

1057

Start / End Page

18 / 23