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arxiv: 0910.4126 · v2 · submitted 2009-10-21 · ❄️ cond-mat.mes-hall · cond-mat.mtrl-sci

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

classification ❄️ cond-mat.mes-hall cond-mat.mtrl-sci
keywords angle-resolvedcouplingelectron-phononfoundgraphenephotoemissionpotassium-dopedrenormalization
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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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