Time-resolved Raman spectroscopy of optical phonons in graphite: Phonon anharmonic coupling and anomalous stiffening

Hugen Yan, Daohua Song, Kin Fai Mak, Ioannis Chatzakis, Janina Maultzsch, Tony F. Heinz

Research output: Contribution to journalArticle

86 Citations (Scopus)

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 languageEnglish (US)
Article number121403
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number12
DOIs
StatePublished - Sep 17 2009

Fingerprint

stiffening
Graphite
Phonons
Raman spectroscopy
phonons
graphite
Electron-phonon interactions
electron phonon interactions
Scattering
life (durability)
Electrons
probes
decay
scattering
electronics
excitation
electrons
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Yan, Hugen ; Song, Daohua ; Mak, Kin Fai ; Chatzakis, Ioannis ; Maultzsch, Janina ; Heinz, Tony F. / Time-resolved Raman spectroscopy of optical phonons in graphite : Phonon anharmonic coupling and anomalous stiffening. In: Physical Review B - Condensed Matter and Materials Physics. 2009 ; Vol. 80, No. 12.
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Time-resolved Raman spectroscopy of optical phonons in graphite : Phonon anharmonic coupling and anomalous stiffening. / Yan, Hugen; Song, Daohua; Mak, Kin Fai; Chatzakis, Ioannis; Maultzsch, Janina; Heinz, Tony F.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 12, 121403, 17.09.2009.

Research output: Contribution to journalArticle

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AU - Maultzsch, Janina

AU - Heinz, Tony F.

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