Influence of surface and subsurface Co–Ir alloy on the electronic properties of graphene

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2021
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Wang, Kangli
Vincent, Thomas
Bouhiron, Jean Baptiste
Pons, Stephane
Roditchev, Dimitri
Vlaic, Sergio
Voloshina, Elena
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Using density functional theory (DFT) calculations and angle-resolved photoemission spectroscopy (ARPES) the structural and electronic properties of graphene on the surface and subsurface Co–Ir alloy are investigated upon the intercalation of Co in graphene/Ir(111). It is found computationally that the interaction strength between graphene and substrate is strongly affected by the composition and nature of an alloy, implying the large difference in the electronic structure of monolayer graphene on CoxIr1−x/Ir(111) and Ir/CoxIr1−x/Ir(111). Our theoretical results are supported by ARPES data, which demonstrate the disappearance of the Dirac cone when graphene lies on Co and its restoration upon the formation of the subsurface Co–Ir alloy.

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530 Physik
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Graphene, Intercalation, Alloy, DFT, LEED, STM, ARPES
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ISO 690WANG, Kangli, Thomas VINCENT, Jean Baptiste BOUHIRON, Stephane PONS, Dimitri RODITCHEV, Sabina SIMON, Mikhail FONIN, Yuriy S. DEDKOV, Sergio VLAIC, Elena VOLOSHINA, 2021. Influence of surface and subsurface Co–Ir alloy on the electronic properties of graphene. In: Carbon. Elsevier. 2021, 183, pp. 251-258. ISSN 0008-6223. eISSN 1873-3891. Available under: doi: 10.1016/j.carbon.2021.06.082
BibTex
@article{Wang2021Influ-55780,
  year={2021},
  doi={10.1016/j.carbon.2021.06.082},
  title={Influence of surface and subsurface Co–Ir alloy on the electronic properties of graphene},
  volume={183},
  issn={0008-6223},
  journal={Carbon},
  pages={251--258},
  author={Wang, Kangli and Vincent, Thomas and Bouhiron, Jean Baptiste and Pons, Stephane and Roditchev, Dimitri and Simon, Sabina and Fonin, Mikhail and Dedkov, Yuriy S. and Vlaic, Sergio and Voloshina, Elena}
}
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