Electron-phonon coupling in single-walled carbon nanotubes determined by shot noise

被引：10

作者：

Wu, F. ^{[1
]}

Virtanen, P. ^{[1
]}

Andresen, S. ^{[2
]}

Placais, B. ^{[3
]}

Hakonen, P. J. ^{[1
]}

机构：

[1] Aalto Univ, Low Temp Lab, FI-00076 Espoo, Aalto, Finland

[2] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

[3] Ecole Normale Super, Lab Pierre Aigrain, F-75005 Paris, France

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 26期

基金：

芬兰科学院;

关键词：

TRANSPORT; BUNDLES; METALS;

D O I：

10.1063/1.3533018

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured shot noise in metallic single-walled carbon nanotubes of length L = 1 mu m and have found strong suppression of noise with increasing voltage. We conclude that the coupling of electron and phonon baths at temperatures T(e) and T(ph) is described at intermediate bias (20 mV <V(ds) less than or similar to 200 mV) by heat flow equation P=Sigma L(T(e)(3)-T(ph)(3)), where Sigma similar to 3 x 10(-9) W/m K(3) due to electron interaction with acoustic phonons, while at higher voltages optical phonon-electron interaction leads to P=kappa(op)L[N(T(e))-N(T(ph))], where N(T) = 1/[exp((h) over bar Omega/k(B)T)-1] with optical phonon energy (h) over bar Omega and kappa(op) = 2 x 10(2) W/m. (C) 2010 American Institute of Physics. [doi:10.1063/1.3533018]

引用

页数：3

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