publication . Article . 2014

Non-equilibrium Dirac carrier dynamics in graphene investigated with time- and angle-resolved photoemission spectroscopy

Gierz, I.; Link, S.; Starke, U.; Cavalleri, A.;
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  • Published: 28 Apr 2014 Journal: Faraday Discuss., volume 171, pages 311-321 (issn: 1359-6640, eissn: 1364-5498, Copyright policy)
  • Publisher: Royal Society of Chemistry (RSC)
Abstract
<p>We have used time- and angle-resolved photoemission spectroscopy (tr-ARPES) to assess the influence of many-body interactions on the Dirac carrier dynamics in graphene. From the energy-dependence of the measured scattering rates we directly determine the imaginary part of the self-energy, visualizing the existence of a relaxation bottleneck associated with electron–phonon coupling. A comparison with static line widths obtained by high-resolution ARPES indicates that the dynamics of photo-excited carriers in graphene are solely determined by the equilibrium self-energy. Furthermore, the subtle interplay of different many-body interactions in graphene may allow...
Subjects
free text keywords: Physical and Theoretical Chemistry, Angle-resolved photoemission spectroscopy, Photoemission spectroscopy, Graphene, law.invention, law, Impact ionization, Scattering, Chemistry, Condensed matter physics, Photon, Dirac (video compression format), Multiple exciton generation
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