CrossRef Open Access 2016 14 sitasi

Quasi-freestanding graphene on Ni(111) by Cs intercalation

M. Alattas U. Schwingenschlögl

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Abstrak

AbstractA possible approach to achieve quasi-freestanding graphene on a substrate for technological purpose is the intercalation of alkali metal atoms. Cs intercalation between graphene and Ni(111) therefore is investigated using density functional theory, incorporating van der Waals corrections. It is known that direct contact between graphene and Ni(111) perturbs the Dirac states. We find that Cs intercalation restores the linear dispersion characteristic of Dirac fermions, which agrees with experiments, but the Dirac cone is shifted to lower energy, i.e., the graphene sheet is n-doped. Cs intercalation therefore decouples the graphene sheet from the substrate except for a charge transfer. On the other hand, the spin polarization of Ni(111) does not extend through the intercalated atoms to the graphene sheet, for which we find virtually spin-degeneracy.

Penulis (2)

M. Alattas

U. Schwingenschlögl

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Alattas, M., Schwingenschlögl, U. (2016). Quasi-freestanding graphene on Ni(111) by Cs intercalation. https://doi.org/10.1038/srep26753

Akses Cepat

Lihat di Sumber doi.org/10.1038/srep26753

Informasi Jurnal

Tahun Terbit: 2016
Bahasa: en
Total Sitasi: 14×
Sumber Database: CrossRef
DOI: 10.1038/srep26753
Akses: Open Access ✓