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

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

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9 Citations (Scopus)


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 languageEnglish
Article number262115
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number26
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed


  • electron-phonon coupling
  • shot noise
  • single-walled carbon nanotubes

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