Plasmon spectroscopy of free-standing graphene films | Zendy

Tim Eberlein | Zendy; U. Bangert | Zendy; Rahul R. Nair | Zendy; R. Jones | Zendy; Mhairi Gass | Zendy; Andrew Bleloch | Zendy; Kostya S. Novoselov | Zendy; A. K. Geǐm | Zendy; P. R. Briddon | Zendy

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Plasmon spectroscopy of free-standing graphene films

Author(s) -

Tim Eberlein,

U. Bangert,

Rahul R. Nair,

R. Jones,

Mhairi Gass,

Andrew Bleloch,

Kostya S. Novoselov,

A. K. Geǐm,

P. R. Briddon

Publication year - 2008

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.77.233406

Subject(s) - graphene , plasmon , spectroscopy , materials science , ab initio , graphite , atomic physics , condensed matter physics , surface plasmon , molecular physics , physics , nanotechnology , optoelectronics , quantum mechanics , composite material

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 pi and pi+sigma-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 pi- and pi+sigma 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.

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