Journal
PHYSICAL REVIEW B
Volume 83, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.165433
Keywords
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Funding
- European Community [226716]
- Iranian Nanotechnology Initiative
- National Elite Foundation (NEF) of Iran
- Isfahan University of Technology (IUT)
- Hungarian Scientific Research Fund [K72613]
- Hungarian Academy of Sciences
- DFG [VY 64/1-1, GR 3708/1-1]
- NanoMikro Programme [431103]
- NSF/DMR [10-04147]
- APART fellowship
- MC reintegration grant
- Autonomous Province of Trento
- [FWF-I377-N16]
- Austrian Science Fund (FWF) [I 377] Funding Source: researchfish
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1004147] Funding Source: National Science Foundation
- Austrian Science Fund (FWF) [I377] Funding Source: Austrian Science Fund (FWF)
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We show with angle-resolved photoemission spectroscopy that a new energy band appears in the electronic structure of electron-doped hydrogenated monolayer graphene (H-graphene). Its occupation can be controlled with the hydrogen amount and allows for tuning of graphene's doping level. Our calculations of the electronic structure of H-graphene suggest that this state is largely composed of hydrogen 1s orbitals and remains extended for low H coverages despite the random chemisorption of H. Further evidence for the existence of a hydrogen state is provided by x-ray absorption studies of undoped H-graphene which are clearly showing the emergence of an additional state in the vicinity of the pi* resonance.
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