Nonequilibrium Tunneling Spectroscopy in Carbon Nanotubes

被引：66
|
作者：
Chen, Yung-Fu [1 ,2 ]
Dirks, Travis [1 ,2 ]
Al-Zoubi, Gassem [3 ]
Birge, Norman O. [3 ]
Mason, Nadya [1 ,2 ]
机构：
[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[2] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA
[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 03期
基金：
美国国家科学基金会;
关键词：
ELECTRON-ELECTRON SCATTERING; SHOT-NOISE; CONDUCTORS; CONTACTS; WIRES;
D O I：
10.1103/PhysRevLett.102.036804
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report measurements of the nonequilibrium electron energy distribution in carbon nanotubes. Using tunneling spectroscopy via a superconducting probe, we study the shape of the local electron distribution functions, and hence energy relaxation rates, in nanotubes that have bias voltages applied between their ends. At low temperatures, electrons interact weakly in nanotubes of a few microns channel length, independent of end-to-end-conductance values. Surprisingly, the energy relaxation rate can increase substantially when the temperature is raised to only 1.5 K.
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页数：4
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