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  • Title: Angle-resolved photoemission spectra of graphene from first-principles calculations.
    Author: Park CH, Giustino F, Spataru CD, Cohen ML, Louie SG.
    Journal: Nano Lett; 2009 Dec; 9(12):4234-9. PubMed ID: 19856901.
    Abstract:
    Angle-resolved photoemission spectroscopy (ARPES) is a powerful experimental technique for directly probing electron dynamics in solids. The energy versus momentum dispersion relations and the associated spectral broadenings measured by ARPES provide a wealth of information on quantum many-body interaction effects. In particular, ARPES allows studies of the Coulomb interaction among electrons (electron-electron interactions) and the interaction between electrons and lattice vibrations (electron-phonon interactions). Here, we report ab initio simulations of the ARPES spectra of graphene including both electron-electron and electron-phonon interactions on the same footing. Our calculations reproduce some of the key experimental observations related to many-body effects, including the indication of a mismatch between the upper and lower halves of the Dirac cone.
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