Negative differential conductance and hot phonons in suspended nanotube molecular wires

被引：386

作者：

Pop, E ^{[1
]}

Mann, D

Cao, J

Wang, Q

Goodson, KE

Dai, HJ

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] Stanford Univ, Adv Mat Lab, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Mech Engn & Thermal Sci, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.95.155505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Freely suspended metallic single-walled carbon nanotubes (SWNTs) exhibit reduced current carrying ability compared to those lying on substrates, and striking negative differential conductance at low electric fields. Theoretical analysis reveals significant self-heating effects including electron scattering by hot nonequilibrium optical phonons. Electron transport characteristics under strong self-heating are exploited for the first time to probe the thermal conductivity of individual SWNTs (similar to 3600 W m(-1) K-1 at T=300 K) up to similar to 700 K, and reveal a 1/T dependence expected for umklapp phonon scattering at high temperatures.

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页数：4

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