Fermi electron wave packet interference images on carbon nanotubes at room temperature

被引：22

作者：

Hassanien, A

Tokumoto, M

Umek, P

Mihailovic, D

Mrzel, A

机构：

[1] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

[2] Jozef Stefan Inst, Ljubljana 6111, Slovenia

来源：

APPLIED PHYSICS LETTERS | 2001年 / 78卷 / 06期

关键词：

D O I：

10.1063/1.1345803

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the structure and electronic properties of single wall carbon nanotubes tips with atomically spatial resolution. Scanning tunneling microscopy shows topographic images of closed tips with a variety of geometrical structure; these include round, conical, as well as tips with a messy shape. Standing wave pattern of the charge density is observed at the tube cap which is formed due to constructive interference between the electronic states and its reflection on the nanotube tips. Atomically resolved images show asymmetry in the charge density that decay out within 6 nm away from the cap. These distinctive tip states do not exist elsewhere on the tube and are related to the presence of topological defects at tube ends. (C) 2001 American Institute of Physics.

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页码：808 / 810

页数：3

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