| Dependence of electronic and optical properties on a high-frequency field for carbon nanotubes | |
| W. H. Liao; G. H. Zhou; K. H. Ding | |
| 2008 | |
| Source Publication | Journal of Applied Physics
 |
| ISSN | 0021-8979 |
| Volume | 103Issue:7 |
| Abstract | We theoretically study the electronic structure, transport, and optical properties for a zigzag single-wall carbon nanotube (CNT) connected to two normal conductor leads under the irradiation of an external electromagnetic field at low temperatures, with particular emphasis on the features of high-frequency response. Using the standard nonequilibrium Green's function techniques, we examine the time-averaged density of states (DOS), the conductivity, the dielectric function, and the electron energy loss spectra for the system with photon polarization parallel with the tunneling current direction, respectively. Through some numerical examples, it is shown that the DOS is strongly dependent on the incident electron energy, the strength, and frequency of the applied field. For higher electron energies in comparison with lead-nanotube coupling energy, the system conductance decreases with increasing field strength and increases with increasing field frequency, respectively, and shows some oscillation structures. Moreover, the optical functions for the system have also a rich structure with the variation of field frequency. It may demonstrate that this transport dependence on the external field parameters can be used to give the energy spectra information of CNTs and to detect the high-frequency microwave irradiation. (c) 2008 American Institute of Physics. |
| description.department | [liao, wenhu; zhou, guanghui] hunan normal univ, dept phys, changsha 410081, peoples r china. [liao, wenhu; zhou, guanghui] hunan normal univ, key lab educ minst low dimens quantum struct & ma, changsha 410081, peoples r china. [ding, kai-he] changsha univ sci & technol, dept phys & elect sci, changsha 410076, peoples r china. [zhou, guanghui] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;liao, wh (reprint author), hunan normal univ, dept phys, changsha 410081, peoples r china;ghzhou@hunnu.edu.cn |
| Keyword | Tunneling Current Transport Single Superlattices Graphene |
| URL | 查看原文 |
| WOS ID | WOS:000255043200043 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/32927 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | W. H. Liao,G. H. Zhou,K. H. Ding. Dependence of electronic and optical properties on a high-frequency field for carbon nanotubes[J]. Journal of Applied Physics,2008,103(7). |
| APA | W. H. Liao,G. H. Zhou,&K. H. Ding.(2008).Dependence of electronic and optical properties on a high-frequency field for carbon nanotubes.Journal of Applied Physics,103(7). |
| MLA | W. H. Liao,et al."Dependence of electronic and optical properties on a high-frequency field for carbon nanotubes".Journal of Applied Physics 103.7(2008). |
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