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

F. Wu; P. Virtanen; S. Andresen; B. Placais; P. J. Hakonen

doi:10.1063/1.3533018

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

F. Wu, P. Virtanen, S. Andresen, B. Placais, P. J. Hakonen

Department of Applied Physics

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Abstract

We have measured shot noise in metallic single-walled carbon nanotubes of length L=1 μm and have found strong suppression of noise with increasing voltage. We conclude that the coupling of electron and phonon baths at temperatures Te and Tph is described at intermediate bias (20 mV<Vds≲200 mV) by heat flow equation P=ΣL(T3e−T3ph), where Σ∼3×10−9 W/m K3 due to electron interaction with acoustic phonons, while at higher voltages optical phonon-electron interaction leads to P=κopL[N(Te)−N(Tph)], where N(T)=1/[exp(ℏΩ/kBT)−1] with optical phonon energy ℏΩ and κop=2×102 W/m.

Original language	English
Article number	262115
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	97
Issue number	26
DOIs	https://doi.org/10.1063/1.3533018
Publication status	Published - 2010
MoE publication type	A1 Journal article-refereed

Keywords

electron-phonon coupling
shot noise
single-walled carbon nanotubes

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10.1063/1.3533018

1.3533018Final published version, 311 KB

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title = "Electron-phonon coupling in single-walled carbon nanotubes determined by shot noise",

abstract = "We have measured shot noise in metallic single-walled carbon nanotubes of length L=1 μm and have found strong suppression of noise with increasing voltage. We conclude that the coupling of electron and phonon baths at temperatures Te and Tph is described at intermediate bias (20 mV<Vds≲200 mV) by heat flow equation P=ΣL(T3e−T3ph), where Σ∼3×10−9 W/m K3 due to electron interaction with acoustic phonons, while at higher voltages optical phonon-electron interaction leads to P=κopL[N(Te)−N(Tph)], where N(T)=1/[exp(ℏΩ/kBT)−1] with optical phonon energy ℏΩ and κop=2×102 W/m.",

keywords = "electron-phonon coupling, shot noise, single-walled carbon nanotubes, electron-phonon coupling, shot noise, single-walled carbon nanotubes, electron-phonon coupling, shot noise, single-walled carbon nanotubes",

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year = "2010",

doi = "10.1063/1.3533018",

language = "English",

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T1 - Electron-phonon coupling in single-walled carbon nanotubes determined by shot noise

AU - Wu, F.

AU - Virtanen, P.

AU - Andresen, S.

AU - Placais, B.

AU - Hakonen, P. J.

PY - 2010

Y1 - 2010

N2 - We have measured shot noise in metallic single-walled carbon nanotubes of length L=1 μm and have found strong suppression of noise with increasing voltage. We conclude that the coupling of electron and phonon baths at temperatures Te and Tph is described at intermediate bias (20 mV<Vds≲200 mV) by heat flow equation P=ΣL(T3e−T3ph), where Σ∼3×10−9 W/m K3 due to electron interaction with acoustic phonons, while at higher voltages optical phonon-electron interaction leads to P=κopL[N(Te)−N(Tph)], where N(T)=1/[exp(ℏΩ/kBT)−1] with optical phonon energy ℏΩ and κop=2×102 W/m.

AB - We have measured shot noise in metallic single-walled carbon nanotubes of length L=1 μm and have found strong suppression of noise with increasing voltage. We conclude that the coupling of electron and phonon baths at temperatures Te and Tph is described at intermediate bias (20 mV<Vds≲200 mV) by heat flow equation P=ΣL(T3e−T3ph), where Σ∼3×10−9 W/m K3 due to electron interaction with acoustic phonons, while at higher voltages optical phonon-electron interaction leads to P=κopL[N(Te)−N(Tph)], where N(T)=1/[exp(ℏΩ/kBT)−1] with optical phonon energy ℏΩ and κop=2×102 W/m.

KW - electron-phonon coupling

KW - shot noise

KW - single-walled carbon nanotubes

KW - electron-phonon coupling

KW - shot noise

KW - single-walled carbon nanotubes

KW - electron-phonon coupling

KW - shot noise

KW - single-walled carbon nanotubes

UR - http://dx.doi.org/10.1063/1.3533018

U2 - 10.1063/1.3533018

DO - 10.1063/1.3533018

M3 - Article

SN - 0003-6951

VL - 97

SP - 1

EP - 3

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

M1 - 262115

ER -

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

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