Journal
NANO LETTERS
Volume 9, Issue 12, Pages 4234-4239Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl902448v
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Funding
- NSF [DMR07-05941]
- Director, Office of Science, Office of Basic Energy [DE-AC02-05CH11231]
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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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