Plasmon spectroscopy of free-standing graphene films

被引：440

作者：

Eberlein, T. ^{[1
]}

Bangert, U. ^{[2
]}

Nair, R. R. ^{[2
,4
]}

Jones, R. ^{[1
]}

Gass, M. ^{[3
]}

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

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

Geim, A. ^{[4
]}

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

机构：

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

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

[3] SERC, Daresbury Lab, CCLRC, 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：

PHYSICAL REVIEW B | 2008年 / 77卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.77.233406

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 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.

引用

页数：4

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