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Plasmon spectroscopy of free-standing graphene films

Lookup NU author(s): Professor Patrick Briddon


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Plasmon spectroscopy of the thinnest possible membrane, a single layer of carbon atoms: graphene, has been carried out in conjunction with ab initio calculations of the low loss function. We observe π and π+σ -surface plasmon modes in free-standing single sheets at 4.7 and 14.6 eV, which are substantially redshifted from their values in graphite. These modes are in very good agreement with the theoretical spectra, which find the π - and π+σ in-plane modes of graphene at 4.8 and 14.5 eV. We also find that there is little loss caused by out-of-plane modes for energies less than about 10 eV. © 2008 The American Physical Society.

Publication metadata

Author(s): Eberlein T, Bangert U, Nair RR, Jones R, Gass M, Bleloch AL, Novoselov KS, Geim A, Briddon PR

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2008

Volume: 77

Issue: 23

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society


DOI: 10.1103/PhysRevB.77.233406

Notes: Article no. 233406 4 pages


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