Ultrafast Electron-Phonon Decoupling in Graphite

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dc.creatorIshioka, Kunie
dc.creatorHase, Muneaki
dc.creatorKitajima, Masahiro
dc.creatorWirtz, Ludger
dc.creatorRubio, Angel
dc.creatorPetek, Hrvoje
dc.date2007-12-12
dc.date.accessioned2026-07-07T09:26:19Z
dc.date.available2026-07-07T09:26:19Z
dc.descriptionWe report the ultrafast dynamics of the 47.4 THz coherent phonons of graphite interacting with a photoinduced non-equilibrium electron-hole plasma. Unlike conventional materials, upon photoexcitation the phonon frequency of graphite upshifts, and within a few picoseconds relaxes to the stationary value. Our first-principles density functional calculations demonstrate that the phonon stiffening stems from the light-induced decoupling of the non-adiabatic electron-phonon interaction by creating the non-equilibrium electron-hole plasma. Time-resolved vibrational spectroscopy provides a window on the ultrafast non-equilibrium electron dynamics.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0712.1879
dc.identifierhttp://arxiv.org/abs/0712.1879
dc.identifierPhys. Rev. B 77, 121402(R) (2008)
dc.identifierdoi:10.1103/PhysRevB.77.121402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156710
dc.subjectOther Condensed Matter
dc.subjectMaterials Science
dc.titleUltrafast Electron-Phonon Decoupling in Graphite
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