卷曲效应对单壁碳纳米管电子结构的影响

秦威; 张振华; 刘新海

doi:10.7498/aps.60.127303

摘要

利用计入卷曲效应的单壁碳纳米管(SWCNT)的能量色散关系,计算最低导带的电子速度及有效质量,并与不计入卷曲效应的结果进行了比较.计算结果表明:卷曲效应对电子速度及有效质量的影响与SWCNT的类型密切相关,金属锯齿型SWCNT对卷曲效应最为敏感,其次是扶手椅型SWCNT,最不敏感的是半导体锯齿型SWCNT.由此可以推断,卷曲效应对金属锯齿型SWCNT电子结构及低偏压输运特性影响最大,其次是扶手椅型SWCNT,影响最不明显的是半导体锯齿型SWCNT.这些结果与实验测量及密度泛函理论计算结果完全一致.

关键词:

Abstract

Based on the energy dispersion relation involving curvature effects for the single-walled carbon nanotube (SWCNT), the electronic velocity and the effective mass of the lowest conduction band for the SWCNT are computed and they are compared with the results without consideration of the curvature effects. The analysis shows that the influences of the curvature effect on the electronic velocity and effective mass depend on type of SWCNT, that is, the metallic zigzag-SWCNT is most sensitive to curvature effect, armchair-SWCNT is second most sensive to curvature effect, and the semiconducting zigzag-SWCNT is poorly sensitive to curvature effect. These findings suggest that curvature effects have the largest effect on the electronic structure and the low-bias transport behaviors of the metallic zigzag-SWCNT,a moderate effect on those of the armchair-SWCNT, and the smallest effect on those of the semiconducting zigzag-SWCNT, which are in good agreement with experimental measurements and the calculated results from the density-functional theory.

Keywords:

作者及机构信息

1.
长沙理工大学物理与电子科学学院,长沙 410004

基金项目: 国家自然科学基金(批准号:61071015, 60771059)资助的课题.

Authors and contacts

1.
School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410004, China

参考文献

[1]	Long M Q, Wang L L 2007 Appl. Phys. Lett. 91 233512
[2]	Fan Z Q, Chen K Q, Wan Q, Zou B S, Duan W H, Shuani Z 2008 Appl. Phys. Lett. 92 263304
[3]
[4]
[5]	Fan Z Q, Chen K Q 2010 Appl. Phys. Lett. 96 053509
[6]
[7]	Zhang Z H, Peng J C, Chen X H 2001 Acta Phys. Sin. 50 1150 (in Chinese) [张振华、彭景翠、陈小华 2001 物理学报 50 1150]
[8]
[9]	Li H H, Li Y D, Wang C K 2002 Acta Phys. Sin. 51 1239 (in Chinese)[李红海、李英德、王传奎 2002 物理学报 51 1239]
[10]
[11]	Deng X Q, Zhou J C, Zhang Z H 2010 Acta Phys. Sin. 59 2714 (in Chinese) [邓小清、周继承、张振华 2010 物理学报 59 2714]
[12]
[13]	Deng X Q, Zhou J C, Zhang Z H, Tang G P, Qiu M 2009 Appl. Phys. Lett. 95 103113
[14]
[15]	Deng X Q, Zhou J C, Zhang Z H, Qiu M, Tang G P 2009 Appl. Phys. Lett. 95 163109
[16]
[17]	Pan J B, Zhang Z H, Deng X Q, Qiu M, Guo C 2010 Appl. Phys. Lett. 97 203104
[18]
[19]	Pan J B, Zhang Z H, Deng X Q, Qiu M, Guo C 2011 Appl. Phys. Lett. 98 013503
[20]
[21]	Zhang Z H, Deng X Q, Tan X Q, Qiu M, Pan J B 2010 Appl. Phys. Lett. 97 183105
[22]
[23]	Zhang Z H, Yang Z, Yuan J H, Zhang H, Deng X Q, Qiu M 2008 J. Chem. Phys.129 094702
[24]	Zhang Z H, Qiu M, Zhang H, Deng X Q 2009 J. Chem. Phys. 130 184703
[25]
[26]	Saito R, Dresselhaus G, Dresslhaus M S 1998 Physical Properties of Carbon Nanotubes (London: Imperial College Press) pp35-136
[27]
[28]	Xie X D, Lu D 1998 Energy Band Theory of Solids (Shanghai:Fudan University Press)pp27,28
[29]
[30]
[31]	Chen H B, Xu N, Ding J W 2008 Solid State Commun. 146 12
[32]	Shyu F L 2010 J. Phys.: Condens. Matter 22 7156
[33]

施引文献

[1]	Long M Q, Wang L L 2007 Appl. Phys. Lett. 91 233512
[2]	Fan Z Q, Chen K Q, Wan Q, Zou B S, Duan W H, Shuani Z 2008 Appl. Phys. Lett. 92 263304
[3]
[4]
[5]	Fan Z Q, Chen K Q 2010 Appl. Phys. Lett. 96 053509
[6]
[7]	Zhang Z H, Peng J C, Chen X H 2001 Acta Phys. Sin. 50 1150 (in Chinese) [张振华、彭景翠、陈小华 2001 物理学报 50 1150]
[8]
[9]	Li H H, Li Y D, Wang C K 2002 Acta Phys. Sin. 51 1239 (in Chinese)[李红海、李英德、王传奎 2002 物理学报 51 1239]
[10]
[11]	Deng X Q, Zhou J C, Zhang Z H 2010 Acta Phys. Sin. 59 2714 (in Chinese) [邓小清、周继承、张振华 2010 物理学报 59 2714]
[12]
[13]	Deng X Q, Zhou J C, Zhang Z H, Tang G P, Qiu M 2009 Appl. Phys. Lett. 95 103113
[14]
[15]	Deng X Q, Zhou J C, Zhang Z H, Qiu M, Tang G P 2009 Appl. Phys. Lett. 95 163109
[16]
[17]	Pan J B, Zhang Z H, Deng X Q, Qiu M, Guo C 2010 Appl. Phys. Lett. 97 203104
[18]
[19]	Pan J B, Zhang Z H, Deng X Q, Qiu M, Guo C 2011 Appl. Phys. Lett. 98 013503
[20]
[21]	Zhang Z H, Deng X Q, Tan X Q, Qiu M, Pan J B 2010 Appl. Phys. Lett. 97 183105
[22]
[23]	Zhang Z H, Yang Z, Yuan J H, Zhang H, Deng X Q, Qiu M 2008 J. Chem. Phys.129 094702
[24]	Zhang Z H, Qiu M, Zhang H, Deng X Q 2009 J. Chem. Phys. 130 184703
[25]
[26]	Saito R, Dresselhaus G, Dresslhaus M S 1998 Physical Properties of Carbon Nanotubes (London: Imperial College Press) pp35-136
[27]
[28]	Xie X D, Lu D 1998 Energy Band Theory of Solids (Shanghai:Fudan University Press)pp27,28
[29]
[30]
[31]	Chen H B, Xu N, Ding J W 2008 Solid State Commun. 146 12
[32]	Shyu F L 2010 J. Phys.: Condens. Matter 22 7156
[33]

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