Electron-phonon coupling in single walled carbon nanotubes determined by shot noise - Condensed Matter > Mesoscale and Nanoscale PhysicsReportar como inadecuado




Electron-phonon coupling in single walled carbon nanotubes determined by shot noise - Condensed Matter > Mesoscale and Nanoscale Physics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We have measured shot noise in metallic single-walled carbon nanotubes oflength L=1 $\mu$m and have found strong suppression of noise with increasingvoltage. We conclude that the coupling of electron and phonon baths attemperatures $T e$ and $T {ph}$ is described at intermediate bias 20 mV $<$\vv $\lesssim $ 200 mV by heat flow equation $P=\Sigma L T e^3-T {ph}^3$where $\Sigma \sim 3 \cdot 10^{-9}$ W-mK$^3$ due to electron interaction withacoustic phonons, while at higher voltages optical phonon - electroninteraction leads to $P =\kappa {op} L N T e-NT {ph}$ where $NT=1-\exp\hbar\Omega-k BT-1$ with optical phonons energy $\hbar \Omega$ and$\kappa {op}=2 \cdot 10^{2}$ W-m.



Autor: Fan Wu, Pauli Virtanen, Soren Andresen, Bernard Placais, Pertti Hakonen

Fuente: https://arxiv.org/







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