Low energy two-dimensional plasmon in epitaxial graphene on Ni (111)

被引：25

作者：

Cupolillo, Anna ^{[1
]}

Ligato, Nadia ^{[1
]}

Caputi, Lorenzo ^{[1
]}

机构：

[1] Univ Calabria, Dept Phys, Surface Nanosci Grp, I-87036 Cosenza, Italy

来源：

SURFACE SCIENCE | 2013年 / 608卷

关键词：

Epitaxial graphene; Two-dimensional plasmon; Electron energy loss spectroscopy; Ni (111); MONOLAYER GRAPHITE; NI(111); SYSTEMS; ELECTRONS; SURFACE; LAYERS; FILMS; GAS;

D O I：

10.1016/j.susc.2012.09.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single layer graphene has been obtained on Ni (111) by dissociation of ethylene. Angle-resolved electron-energy-loss spectra show a low energy plasmon dispersing up to about 2 eV, resulting from fluctuation of a charge density located around the Fermi energy, due to hybridization between Ni and graphene states. The dispersion is typical of a two-dimensional charge layer, and the calculated Fermi velocity is a factor of similar to 0.5 lower than in isolated graphene. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：88 / 91

页数：4

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