Quantum transport in nanowires and nanographene
Transport in nanowires and nanographene with emphasis on nanotubes is reviewed from classical to quantum, low-field to high-field, nondegenrate to degenerate, scattering limited to ballistic, and beyond. Nonequilibrium Arora distribution function (NEADF) is shown to be an outgrowth of the Fermi-Dira...
| Main Author: | |
|---|---|
| Format: | Book Section |
| Published: |
IEEE
2012
|
| Subjects: |
| _version_ | 1796857460510687232 |
|---|---|
| author | Arora, Vijay Kumar |
| author_facet | Arora, Vijay Kumar |
| author_sort | Arora, Vijay Kumar |
| collection | ePrints |
| description | Transport in nanowires and nanographene with emphasis on nanotubes is reviewed from classical to quantum, low-field to high-field, nondegenrate to degenerate, scattering limited to ballistic, and beyond. Nonequilibrium Arora distribution function (NEADF) is shown to be an outgrowth of the Fermi-Dirac statistics by inclusion of the energy gained in a mean free path (mfp). NEADF is highly asymmetric with electrons changing equilibrium random phase to extreme nonequilibrium unilateral phase in a towering electric field. The drift response to the electric field is shown to be limited to the unilateral intrinsic velocity appropriate for twice the carrier concentration as electrons transfer from x-direction to +x-direction in the presence of an extremely high electric field in the x-direction. An electron temperature for degenerate statistics is defined to make it compatible with nondegenrate statistics. The intrinsic velocity giving saturation is shown to be independent of the scattering-limited or ballistic mobility. Optical phonon emission may lower the saturation velocity. In a low-field domain, the mobility may become size-dependent and is ballistic when injection from the ohmic contacts is considered. |
| first_indexed | 2024-03-05T18:58:07Z |
| format | Book Section |
| id | utm.eprints-35810 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T18:58:07Z |
| publishDate | 2012 |
| publisher | IEEE |
| record_format | dspace |
| spelling | utm.eprints-358102017-02-02T05:04:18Z http://eprints.utm.my/35810/ Quantum transport in nanowires and nanographene Arora, Vijay Kumar TK Electrical engineering. Electronics Nuclear engineering Transport in nanowires and nanographene with emphasis on nanotubes is reviewed from classical to quantum, low-field to high-field, nondegenrate to degenerate, scattering limited to ballistic, and beyond. Nonequilibrium Arora distribution function (NEADF) is shown to be an outgrowth of the Fermi-Dirac statistics by inclusion of the energy gained in a mean free path (mfp). NEADF is highly asymmetric with electrons changing equilibrium random phase to extreme nonequilibrium unilateral phase in a towering electric field. The drift response to the electric field is shown to be limited to the unilateral intrinsic velocity appropriate for twice the carrier concentration as electrons transfer from x-direction to +x-direction in the presence of an extremely high electric field in the x-direction. An electron temperature for degenerate statistics is defined to make it compatible with nondegenrate statistics. The intrinsic velocity giving saturation is shown to be independent of the scattering-limited or ballistic mobility. Optical phonon emission may lower the saturation velocity. In a low-field domain, the mobility may become size-dependent and is ballistic when injection from the ohmic contacts is considered. IEEE 2012 Book Section PeerReviewed Arora, Vijay Kumar (2012) Quantum transport in nanowires and nanographene. In: 2012 28th International Conference on Microelectronics - Proceedings, MIEL 2012. IEEE, New York, USA, pp. 3-10. ISBN 978-146730238-8 http://dx.doi.org/10.1109/MIEL.2012.6222787 DOI:10.1109/MIEL.2012.6222787 |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering Arora, Vijay Kumar Quantum transport in nanowires and nanographene |
| title | Quantum transport in nanowires and nanographene |
| title_full | Quantum transport in nanowires and nanographene |
| title_fullStr | Quantum transport in nanowires and nanographene |
| title_full_unstemmed | Quantum transport in nanowires and nanographene |
| title_short | Quantum transport in nanowires and nanographene |
| title_sort | quantum transport in nanowires and nanographene |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
| work_keys_str_mv | AT aroravijaykumar quantumtransportinnanowiresandnanographene |