Electron temperature dependence of the electron-phonon coupling strength in double-wall carbon nanotubes

Ioannis Chatzakis

doi:10.1063/1.4816055

Electron temperature dependence of the electron-phonon coupling strength in double-wall carbon nanotubes

Ioannis Chatzakis

Physics

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We applied Time-Resolved Two-Photon Photoemission spectroscopy to probe the electron-phonon (e-ph) coupling strength in double-wall carbon nanotubes. The e-ph energy transfer rate G(T_e, T_l) from the electronic system to the lattice depends linearly on the electron (T_e) and lattice (T_l) temperatures for T_e>Θ _Debye. Moreover, we numerically solved the Two-Temperature Model. We found: (i) a T_e decay with a 3.5 ps time constant and no significant change in T_l; (ii) an e-ph coupling factor of 2 × 10 ¹⁶ W/m³; (iii) a mass-enhancement parameter, λ, of (5.4 ± 0.9) × 10^-4; and (iv) a decay time of the electron energy density to the lattice of 1.34 ± 0.85 ps.

Original language	English
Article number	043110
Journal	Applied Physics Letters
Volume	103
Issue number	4
DOIs	https://doi.org/10.1063/1.4816055
State	Published - Jul 22 2013

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title = "Electron temperature dependence of the electron-phonon coupling strength in double-wall carbon nanotubes",

abstract = "We applied Time-Resolved Two-Photon Photoemission spectroscopy to probe the electron-phonon (e-ph) coupling strength in double-wall carbon nanotubes. The e-ph energy transfer rate G(Te, Tl) from the electronic system to the lattice depends linearly on the electron (Te) and lattice (Tl) temperatures for Te>Θ Debye. Moreover, we numerically solved the Two-Temperature Model. We found: (i) a Te decay with a 3.5 ps time constant and no significant change in Tl; (ii) an e-ph coupling factor of 2 × 10 16 W/m3; (iii) a mass-enhancement parameter, λ, of (5.4 ± 0.9) × 10-4; and (iv) a decay time of the electron energy density to the lattice of 1.34 ± 0.85 ps.",

author = "Ioannis Chatzakis",

note = "Funding Information: This work was supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy. The author gratefully thanks Prof. E. N. Economou for useful discussions and acknowledges Prof. P. Richard and Dr. P. Tassin for helpful suggestions; these contributions have helped the quality of this paper.",

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T1 - Electron temperature dependence of the electron-phonon coupling strength in double-wall carbon nanotubes

AU - Chatzakis, Ioannis

N1 - Funding Information: This work was supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy. The author gratefully thanks Prof. E. N. Economou for useful discussions and acknowledges Prof. P. Richard and Dr. P. Tassin for helpful suggestions; these contributions have helped the quality of this paper.

PY - 2013/7/22

Y1 - 2013/7/22

N2 - We applied Time-Resolved Two-Photon Photoemission spectroscopy to probe the electron-phonon (e-ph) coupling strength in double-wall carbon nanotubes. The e-ph energy transfer rate G(Te, Tl) from the electronic system to the lattice depends linearly on the electron (Te) and lattice (Tl) temperatures for Te>Θ Debye. Moreover, we numerically solved the Two-Temperature Model. We found: (i) a Te decay with a 3.5 ps time constant and no significant change in Tl; (ii) an e-ph coupling factor of 2 × 10 16 W/m3; (iii) a mass-enhancement parameter, λ, of (5.4 ± 0.9) × 10-4; and (iv) a decay time of the electron energy density to the lattice of 1.34 ± 0.85 ps.

AB - We applied Time-Resolved Two-Photon Photoemission spectroscopy to probe the electron-phonon (e-ph) coupling strength in double-wall carbon nanotubes. The e-ph energy transfer rate G(Te, Tl) from the electronic system to the lattice depends linearly on the electron (Te) and lattice (Tl) temperatures for Te>Θ Debye. Moreover, we numerically solved the Two-Temperature Model. We found: (i) a Te decay with a 3.5 ps time constant and no significant change in Tl; (ii) an e-ph coupling factor of 2 × 10 16 W/m3; (iii) a mass-enhancement parameter, λ, of (5.4 ± 0.9) × 10-4; and (iv) a decay time of the electron energy density to the lattice of 1.34 ± 0.85 ps.

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U2 - 10.1063/1.4816055

DO - 10.1063/1.4816055

M3 - Article

AN - SCOPUS:84884994897

VL - 103

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 4

M1 - 043110

ER -

Electron temperature dependence of the electron-phonon coupling strength in double-wall carbon nanotubes

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