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

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

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

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 languageEnglish
Article number262115
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number26
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Keywords

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

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