2011/05/18 by Ioannis Chatzakis, Hugen Yan, Daohua Song +2 · 70 citations
Materials Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Anharmonicity #Atmospheric temperature range #Atomic physics #Carbon Nanotubes in Composites #Carbon nanotube #Condensed matter physics #Femtosecond #Graphite #Laser #Materials science #Mechanical and Optical Resonators #Molecular physics #Nanotechnology #Optics #Phonon #Physics #Raman scattering #Raman spectroscopy #Thermodynamics #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.83.205411
published in Physical Review B 83(20) (American Physical Society) · 21 pages, 3 figures
openalex publication_date 2011/05/18 · arxiv created 2011/06/07 · arxiv updated 2011/06/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on the temperature dependence of the anharmonic decay rate of zone-center (G mode) optical phonons in both single-walled carbon nanotubes and graphite. The measurements are performed using a pump-probe Raman scattering scheme with femtosecond laser pulses. For nanotubes, measured over a temperature range of 6 K--700 K, we observe little temperature dependence of the decay rate below room temperature. Above 300 K, the decay rate increases from 0.8 to 1.7 ps^\ensuremath-1. The decay rates observed for graphite range from 0.5 to 0.8 ps^\ensuremath-1 for temperatures from 300 K--700 K. We compare the behavior observed in carbon nanotubes and graphite and discuss the implications of our results for the mechanism of the anharmonic decay of optical phonons in both systems.