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Hole doping of graphene supported on Ir(111) by AlBr3
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Image of FIG. 1.
FIG. 1.

LEEM study of graphene/AlBr3/Ir(111) system, with (a)–(c) corresponding to ∼10%, ∼50%, ∼95% (by area) intercalation of graphene with AlBr3 at 75 °C, respectively, and (d) to ∼100% intercalated graphene/Ir(111) at 350 °C. Electron energy is 7.5–8 eV, field of view is 20 μm. Panels (e) and (f) show electron reflectivity vs. energy for graphene/Ir(111) and graphene/AlBr3/Ir(111), respectively, collected from ∼1.5 μm patches on the sample surface highlighted with circles. The relations are shown with arrows. The insets in the top-right corners of (e) and (f) show corresponding μLEED patterns, obtained with an electron energy of 38.6 eV.

Image of FIG. 2.
FIG. 2.

Evolution of Al2p and Br3d photoelectron spectra upon deposition of AlBr3 (a)–(c) and subsequent annealing (d), together with a peak-fit analysis. The photon energy is 150 eV.

Image of FIG. 3.
FIG. 3.

ARPES data for pristine (undoped) (a), (b) and doped (c), (d) graphene/Ir(111). Panels (a) and (c) show an overview of the graphene π-band dispersion, with the direction of the Brillouin zone of graphene indicated (ky ). (b) and (d) are the bandmaps in the kx direction cut through the point of the Brillouin zone. The photon energy is 60 eV.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Hole doping of graphene supported on Ir(111) by AlBr3