Scattering strength of potassium on a carbon nanotube with known chirality

被引：1
|
作者：
Tsuchikawa, Ryuichi [1 ,2 ]
Heligman, D. [1 ,2 ]
Blue, B. T. [1 ,2 ]
Zhang, Z. Y. [3 ]
Ahmadi, A. [1 ]
Mucciolo, E. R. [1 ]
Hone, J. [3 ]
Ishigami, M. [1 ,2 ]
机构：
[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA
[2] Univ Cent Florida, Nanosci Technol Ctr, Orlando, FL 32816 USA
[3] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA
来源：
PHYSICAL REVIEW B | 2016年 / 94卷 / 04期
基金：
美国国家科学基金会;
关键词：
FIELD-EFFECT TRANSISTORS; IMPURITY SCATTERING; HIGH-PERFORMANCE; GRAPHENE; CONTACTS; BACKSCATTERING; ADSORPTION; TRANSPORT; DENSITY; STATES;
D O I：
10.1103/PhysRevB.94.045408
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have measured the scattering strength of charged impurities on a semiconducting single-walled carbon nanotube with known chirality. The resistivity of the nanotube is measured as a function of the density of adsorbed potassium atoms, enabling the determination of the resistance added by an individual potassium atom. Holes are scattered 37 times more efficiently than electrons by an adsorbed potassium atom. The determined scattering strength is used to reveal the spatial extent and depth of the scattering potential for potassium, a model Coulomb adsorbate. Our result represents an essential experimental input to understand adsorbate-induced scattering and provides a crucial step for paving the way to rational design of nanotube-based sensors.
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页数：5
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