Abstract
Time-resolved Raman spectroscopy has been applied to probe the anharmonic coupling and electron-phonon interaction of optical phonons in graphite. From the decay of the transient anti-Stokes scattering of the G -mode following ultrafast excitation, we measured a lifetime of 2.2±0.1 ps for zone-center optical phonons. We also observed a transient stiffening of G -mode phonons, an effect attributed to the reduction of the electron-phonon coupling for high electronic temperatures.
| Original language | English (US) |
|---|---|
| Article number | 121403 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 80 |
| Issue number | 12 |
| DOIs | |
| State | Published - Sep 17 2009 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics