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 $\mu$m and have found strong suppression of noise with increasing voltage. We conclude that the coupling of electron and phonon baths at temperatures $T_e$ 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 with acoustic phonons, while at higher voltages optical phonon - electron interaction leads to $P={\kappa }_{op}L[N(T_e)-N(T_{ph})]$ where $N(T)=1/(\exp (\hslash \Omega /k_{B}T)-1)$ with optical phonons energy $\hslash \Omega$ and ${\kappa }_{op}=2\cdot 10^2$ W/m.

9 pages, 3 figures

References in corpus (16)

• Shot Noise in Mesoscopic Conductors
• High-Field Electrical Transport in Single-Wall Carbon Nanotubes
• Negative Differential Conductance and Hot Phonons in Suspended Nanotube Molecular Wires
• Electrical and Thermal Transport in Metallic Single-Wall Carbon Nanotubes on Insulating Substrates
• Electron Transport and Hot Phonons in Carbon Nanotubes
• Electron-phonon heat transfer in monolayer and bilayer graphene
• Energy Relaxation of Hot Dirac Fermions in Graphene
• Shot Noise Detection on a Carbon Nanotube Quantum Dot
• Coupled dynamics of electrons and phonons in metallic nanotubes: current saturation from hot phonons generation
• Spatially-Resolved Temperature Measurements of Electrically-Heated Carbon Nanotubes
• Charge-carrier dynamics in single-wall carbon nanotube bundles: A time-domain study
• Shot Noise with Interaction Effects in Single Walled Carbon Nanotubes
• Evanescent wave transport and shot noise in graphene: ballistic regime and effect of disorder
• Deformation Electron-Phonon Coupling in Disordered Semiconductors and Nanostructures
• Observation of disorder-induced weakening of electron-phonon interaction in thin noble metal films
• Thermal shot noise in top-gated single carbon nanotube field effect transistors

Cited by in corpus (6)

• Supercollision cooling in undoped graphene
• Hot electron cooling by acoustic phonons in graphene
• Electron-phonon coupling in suspended graphene: supercollisions by ripples
• Shot noise of a quantum dot measured with GHz stub impedance matching
• Thermal relaxation in titanium nanowires: signatures of inelastic electron-boundary scattering in heat transfer
• Frequency Dependence of Phonon-Induced Current Noise in ArmchairCarbon Nanotube