Anisotropy of Quasiparticle Lifetimes and the Role of Disorder for Ultrafast Electron Dynamics in Graphite

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dc.creatorMoos, Gunnar
dc.creatorGahl, Cornelius
dc.creatorFasel, Roman
dc.creatorWolf, Martin
dc.creatorHertel, Tobias
dc.date2001-06-23
dc.date.accessioned2026-07-07T02:41:53Z
dc.date.available2026-07-07T02:41:53Z
dc.descriptionFemtosecond time-resolved photoemission of photoexcited electrons in highly oriented pyrolytic graphite (HOPG) provides strong evidence for anisotropies of quasiparticle (QP) lifetimes. Indicative of such anisotropies is a pronounced anomaly in the energy dependence of QP lifetimes between 1.1 eV and 1.5 eV - the vicinity of a saddle point in the graphite bandstructure. This is supported by recent ab initio calculations and a comparison with experiments on defect-enriched HOPG which reveal that disorder, e.g. defects or phonons, increases electron energy relaxation rates.
dc.identifierhttps://arxiv.org/abs/cond-mat/0106486
dc.identifierhttp://arxiv.org/abs/cond-mat/0106486
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17923
dc.subjectCondensed Matter
dc.titleAnisotropy of Quasiparticle Lifetimes and the Role of Disorder for Ultrafast Electron Dynamics in Graphite
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