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Low energy quasiparticle dispersion of graphite by angle-resolved photoemission spectroscopy

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  • Physical
  • Chemical
  • Mathematical & Earth Sciences :: Physics [G04]
  • Physique
  • Chimie
  • Mathématiques & Sciences De La Terre :: Physique [G04]

Abstract

The low energy electron dispersion in graphite is measured by angle-resolved photoemission spectroscopy. The measured photoemission intensity maxima are compared to a tight-binding calculation of the electronic band structure. We observe a strong trigonal warping of the equi-energy contour which is well reproduced by the calculations. Furthermore we clearly show that the concept of Dirac Fermions breaks down for AB stacked graphite. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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