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Transport through higher subbands of a carbon nanotube
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Anantram, M. P. |
| Copyright Year | 1999 |
| Description | The sub-band spacing can be comparable to the bias and kT in large diameter carbon nanotubes. As a result, the role of higher sub-bands cannot be neglected in transport. We discuss two interesting effects involving single particle transport such nanotubes: (i) The transmission probability of electrons at the crossing bands (around E=0) and higher sub-bands are quantitatively different. As a result, we show that the small bias resistance may be larger when the Fermi energy is away from the band center as opposed to being close to the band center. (ii) The primary contribution to current flowing in the presence of an applied bias is due to the crossing sub-bands. This is a result of the electron in the higher sub-bands undergoing Bragg reflection. As a consequence, in an idealized case where scattering is neglected, the differential conductance cannot be much larger than 4e(2)/h. |
| File Size | 411709 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20000092050 |
| Archival Resource Key | ark:/13960/t46q6wm9f |
| Language | English |
| Publisher Date | 1999-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Transport Properties Bias Nanotubes Current Distribution Reflection Electron Distribution Bragg Angle Carbon Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
