Angle-resolved photoemission spectra of graphene from first-principles calculations.

Journal article

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.

Authors: Park, C; Giustino, F; Spataru, C; Cohen, M; Louie, S

• Publication status: Published
• Journal: Nano letters
• Volume: 9
• Issue: 12
• Pages: 4234-4239
• Publication date: 2009-12-01
• DOI: 10.1021/nl902448v
• EISSN: 1530-6992
• ISSN: 1530-6984
• Language: English
• Keywords: Models, Chemical; Nanostructures; Graphite; Light; Computer Simulation; Photoelectron Spectroscopy; Photons; Scattering, Radiation