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

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2010
Major/Subject
Mcode
Degree programme
Language
en
Pages
262115/1-3
Series
Applied Physics Letters, Volume 97, Issue 26
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 exp −9 W/m K exp 3 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=2×10 exp 2 W/m.
Description
Keywords
electron-phonon coupling, single-walled carbon nanotubes, shot noise
Other note
Citation
Wu, F. & Virtanen, P. & Andresen, S. & Placais, B. & Hakonen, Pertti J.. 2010. Electron-phonon coupling in single-walled carbon nanotubes determined by shot noise. Applied Physics Letters. Volume 97, Issue 26. 262115/1-3. ISSN 0003-6951 (printed). DOI: 10.1063/1.3533018