STEM plasmon spectroscopy of free standing graphene

被引：19

作者：

Bangert, U. ^{[1
]}

Eberlein, T. ^{[2
]}

Nair, R. R. ^{[1
,4
]}

Jones, R. ^{[2
]}

Gass, M. ^{[3
]}

Bleloch, A. L. ^{[3
]}

Novoselov, K. S. ^{[4
]}

Geim, A. ^{[4
]}

Briddon, P. R. ^{[5
]}

机构：

[1] Univ Manchester, Sch Mat, Manchester M1 7HS, Lancs, England

[2] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England

[3] CCLRC Daresbury Lab, SuperSTEM Labs, Warrington WA4 4AD, Cheshire, England

[4] Univ Manchester, Sch Phys & Astron, Manchester M1 7HS, Lancs, England

[5] Newcastle Univ, Sch Nat Sci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2008年 / 205卷 / 09期

关键词：

D O I：

10.1002/pssa.200879707

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 eV and 14.8 eV which are substantially red-shifted from their values in graphite. These modes are in very good agreement with the theoretical spectra which find the pi- and pi + pi in-plane modes of graphene at 4.5 eV 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. (C) 2008 WILEY-NCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：2265 / 2269

页数：5

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