Electronic band structure of graphene from resonant soft x-ray spectroscopy: The role of core-hole effects

The electronic structure and band dispersion of graphene on SiO sub(2) have been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS). Using first-principles calculations, it is found that the core-hole effect is dramatic i...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-12, Vol.86 (24), p.245430, Article 245430
Main Authors: Zhang, L., Schwertfager, N., Cheiwchanchamnangij, T., Lin, X., Glans-Suzuki, P.-A., Piper, L. F. J., Limpijumnong, S., Luo, Y., Zhu, J. F., Lambrecht, W. R. L., Guo, J.-H.
Format: Article
Language:English
Subjects:
Absorption
Condensed matter
Conservation
Diamond
Dispersions
Electronic structure
Electronics
Excitons
Fluorescence
Graphene
Graphite
Inelastic-Scattering
Large-Area
Solids
Spectra
Spectroscopy
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Summary:The electronic structure and band dispersion of graphene on SiO sub(2) have been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS). Using first-principles calculations, it is found that the core-hole effect is dramatic in XAS while it has negligible consequences in XES. Strong dispersive features, due to the conservation of crystal momentum, are observed in RIXS spectra. Simulated RIXS spectra based on the Kramers-Heisenberg theory agree well with the experimental results, provided a shift between RIXS and XAS due to the absence or presence of the core hole is taken into account.
ISSN:1098-0121
1550-235X
1550-235X
DOI:10.1103/PhysRevB.86.245430