Scanning tunneling spectroscopy signature of finite-size and connected nanotubes: A tight-binding study

被引:56
作者
Meunier, V [1 ]
Senet, P [1 ]
Lambin, P [1 ]
机构
[1] Fac Univ Notre Dame Paix, Dept Phys, B-5000 Namur, Belgium
来源
PHYSICAL REVIEW B | 1999年 / 60卷 / 11期
关键词
D O I
10.1103/PhysRevB.60.7792
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present tight-binding-based simulations of the scanning tunneling spectroscopic signal of different types of carbon nanotubes. Capped, finite, and connected nanotubes have been investigated. We have computed scanning tunneling spectroscopy (STS) maps of each nanotube on different parts of the systems for various tip-sample bias potentials. STS reflects the electronic structure, which depends on the arrangement of atoms in the systems, and can be drastically different even for similar geometries. The computations are in good agreement with recently measured STS spectra. Furthermore, the STS spectra of pentagon and heptagon, which are needed for connecting different carbon nanotubes, constitute characteristic marks of topological defects.
引用
收藏
页码:7792 / 7795
页数:4
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