Electron-phonon coupling in potassium-doped graphene: Angle-resolved photoemission spectroscopy

Details Electron-phonon coupling in potassium-doped graphene: Angle-resolved photoemission spectroscopy Electron-phonon coupling in potassium-doped graphene: Angle-resolved photoemission spectroscopy

2009-10-21

arxiv.org/abs/0910.4126v2

Phys. Rev. B 81, 041403(R) (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.81.041403

The electron-phonon coupling in potassium-doped graphene on Ir(111) is studied via the renormalization of the pi* band near the Fermi level, using angle-resolved photoemission spectroscopy. The renormalization is found to be fairly weak and almost isotropic, with a mass enhancement parameter of lambda= 0.28(6) for both the K-M and the K-G direction. These results are found to agree well with recent first principles calculations.

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