Dependence of electronic and optical properties on a high-frequency field for carbon nanotubes

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	Dependence of electronic and optical properties on a high-frequency field for carbon nanotubes
	W. H. Liao; G. H. Zhou; K. H. Ding
	2008
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	103 期号:7
摘要	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.
部门归属	[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
关键词	Tunneling Current Transport Single Superlattices Graphene
URL	查看原文
WOS记录号	WOS:000255043200043
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32927
专题	中国科学院金属研究所
推荐引用方式 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).