期刊
PHYSICAL REVIEW B
卷 86, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.245430
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资金
- National NSF of China [21173200]
- Specialized Research Fund for the Doctoral Program of Higher Education of the Ministry of Education [20113402110029]
- National Basic Research Program of China [2010CB923302]
- Thailand Research Fund for an Royal Golden Jubilee scholarship [PHD/0089/2551]
- NSF [DMR-1104595]
- US Department of Energy [DE-AC02-05CH11231]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1104595] Funding Source: National Science Foundation
The electronic structure and band dispersion of graphene on SiO2 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. DOI: 10.1103/PhysRevB.86.245430
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