Femtosecond time-resolved photoemission as a probe of electronic transport in 
single wall carbon nanotubes

Hertel, Tobias; Moos, Gunnar

doi:10.1063/1.59815

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Femtosecond time-resolved photoemission as a probe of electronic transport in single wall carbon nanotubes

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Hertel, Tobias
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Moos, Gunnar
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Hertel, T., & Moos, G. (1999). Femtosecond time-resolved photoemission as a probe of electronic transport in single wall carbon nanotubes. AIP Conference Proceedings, 486, 384-387. doi:10.1063/1.59815.

Cite as: https://hdl.handle.net/21.11116/0000-0008-DD5C-9

Abstract

We have performed the first time-domain measurements of the electron-electron (e-e) and electron-phonon (e-ph) dynamics in single-wall carbon nanotube samples (bucky paper) using time-resolved two-photon photoemission. In these room temperature experiments the absorption of a visible femtosecond pump pulse creates a non-equilibrium electron distribution whose evolution in time can be probed by a second UV-pulse. The decay of the excited electron distribution is characterized by a fast channel on the subpicosecond time-scale—associated with thermalization of the non-equilibrium distribution—and a slower channel which can be attributed to e-ph interaction. Once thermalized the electron distribution cools down to the lattice temperature as determined by the electron-phonon coupling constant g which was found to be 1×10¹⁵ Wm⁻³ K⁻¹.