Electron transport in a toroidal carbon nanotube device

被引：10
作者：
Liu, CP
Guo, ZX
Ding, JW [1 ]
Yan, XH
机构：
[1] Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 210016, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2005年 / 365卷 / 1-4期
基金：
中国国家自然科学基金;
关键词：
toroidal carbon nanotube; tight-binding Green's function; negative differential conductance;
D O I：
10.1016/j.physb.2005.05.003
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Taking the curvature and disorder into account, the electron transport in a carbon molecular device consisting of a toroidal carbon nanotube connected with two semi-infinite metallic carbon nanotubes, has been investigated by using the tight-binding Green's function method and the Landauer Buttiker formula. It is shown that the current through the device can be modulated by the disorder in the molecular device and/or the torus-tube distance. The negative differential conductance is obtained at relatively large bias, while the current has little increase for small voltages. The results are in good agreement with the experimental observation. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：109 / 113
页数：5
相关论文
共 24 条
  • [1] Conductance of carbon nanotubes with disorder: A numerical study
    Anantram, MP
    Govindan, TR
    [J]. PHYSICAL REVIEW B, 1998, 58 (08) : 4882 - 4887
  • [2] Electrical conductance of carbon nanotori in contact with single-wall carbon nanotubes
    Chou, YY
    Guo, GY
    Liu, L
    Jayanthi, CS
    Wu, SY
    [J]. JOURNAL OF APPLIED PHYSICS, 2004, 96 (04) : 2249 - 2253
  • [3] Nanotube nanodevice
    Collins, PG
    Zettl, A
    Bando, H
    Thess, A
    Smalley, RE
    [J]. SCIENCE, 1997, 278 (5335) : 100 - 103
  • [4] Datta S., 1997, ELECT TRANSPORT MESO
  • [5] Curvature and strain effects on electronic properties of single-wall carbon nanotubes
    Ding, JW
    Yan, XH
    Cao, JX
    Wang, DL
    Tang, Y
    Yang, QB
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (27) : L439 - L445
  • [6] Theory of an all-carbon molecular switch
    Gutierrez, R
    Fagas, G
    Cuniberti, G
    Grossmann, F
    Schmidt, R
    Richter, K
    [J]. PHYSICAL REVIEW B, 2002, 65 (11) : 1 - 4
  • [7] Carbon nanotube closed-ring structures
    Hod, O
    Rabani, E
    Baer, R
    [J]. PHYSICAL REVIEW B, 2003, 67 (19):
  • [8] HELICAL MICROTUBULES OF GRAPHITIC CARBON
    IIJIMA, S
    [J]. NATURE, 1991, 354 (6348) : 56 - 58
  • [9] Subband mixing rules in circumferentially perturbed carbon nanotubes: Effects of transverse electric fields
    Kim, YH
    Chang, KJ
    [J]. PHYSICAL REVIEW B, 2001, 64 (15)
  • [10] Defects and external field effects on the electronic properties of a carbon nanotube torus -: art. no. 155413
    Latgé, A
    Rocha, CG
    Wanderley, LAL
    Pacheco, M
    Orellana, P
    Barticevic, Z
    [J]. PHYSICAL REVIEW B, 2003, 67 (15)
123