期刊文献+

Size effect of quantum conductance in carbon nanotube Y-Junctions 被引量:1

Size effect of quantum conductance in carbon nanotube Y-Junctions
原文传递
导出
摘要 This paper studies the quantum conductance properties of three-terminated carbon nanotube Y-junctions, which are built by connecting three (5,5) single-walled carbon nanotubes. The results show that the quantum conductance at the Fermi energy oscillates periodically with the junction's size, and the number of oscillating periodic layers is 3 which is the same as that in the two terminated (10, 0)/m(5, 5)/(10, 0) junctions. Moreover, this Y-junction with different size exhibits an obviously different distribution of electron current in the two drain branches, called shunt valve effect of electronic current. Thus the degree of this effect can be controlled and modulated directly by constructing the three branches' sizes or the distribution of defect. The results show in detail that the difference between the two drain currents can be up to two times for some constructions with special sizes. In addition, the uniform distribution of defects in the Y-junction leads to lower quantum conductance than that of other defect configurations. This paper studies the quantum conductance properties of three-terminated carbon nanotube Y-junctions, which are built by connecting three (5,5) single-walled carbon nanotubes. The results show that the quantum conductance at the Fermi energy oscillates periodically with the junction's size, and the number of oscillating periodic layers is 3 which is the same as that in the two terminated (10, 0)/m(5, 5)/(10, 0) junctions. Moreover, this Y-junction with different size exhibits an obviously different distribution of electron current in the two drain branches, called shunt valve effect of electronic current. Thus the degree of this effect can be controlled and modulated directly by constructing the three branches' sizes or the distribution of defect. The results show in detail that the difference between the two drain currents can be up to two times for some constructions with special sizes. In addition, the uniform distribution of defects in the Y-junction leads to lower quantum conductance than that of other defect configurations.
作者 刘红
机构地区 Physics Department
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第5期511-518,共8页 中国物理B(英文版)
基金 Project supported by the Natural Science Foundation of Jiangsu Education Department (Grant No. 04KJB140065) in China
关键词 single-walled carbon nanotube Y-iunction quantum conductance local density of state single-walled carbon nanotube, Y-iunction, quantum conductance, local density of state
  • 相关文献

参考文献27

  • 1Tans S J, Devoret M H, Dai H, Thess A, Smalley R E, Geerligs L J and Dekker C 1997 Nature (London) 386 474.
  • 2Bockrath M, Cobden D H, McEuen P L, Chopra N G, Zettl A, Thess A and Smalley R E 1997 Science 275 1922.
  • 3del Alamo J A and Eugster C C 1990 Appl. Phys. Lett. 56 78.
  • 4Sols F, Macucci M, Ravaioli U and Hess K 1989 J. Appl. Phys. 66 3892.
  • 5Palm T and Thylen L 1992 Appl. Phys. Lett. 60 237.
  • 6Worschech L, Weidner B, Reitzenstein S and Forchel A 2001 Appl. Phys. Lett. 78 3325.
  • 7Xu H: Q'2001" Appl. Phys. Lett. 78 2064.
  • 8Hieke K and Ulfward M 2000 Phys. Rev. B 62 16727.
  • 9Chico L, Crespi V H, Benedict L X, Louie S G and Cohen M L 1996 Phys. Rev. Lett. 76 971.
  • 10Chico L, Lopez Sancho M P and Munoz M C 1998 Phys. Rev. Lett. 81 1278.

同被引文献4

引证文献1

二级引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部