Plasmon features in electron energy loss spectra from carbon materials

被引：48

作者：

Calliari, L. ^{[1
]}

Fanchenko, S.

Filippi, M.

机构：

[1] ITC, IRST, Ctr Ric Sci & Tecnol, I-38050 Povo, Trento, Italy

[2] RRC Kurchatov Inst, Moscow, Russia

来源：

CARBON | 2007年 / 45卷 / 07期

关键词：

D O I：

10.1016/j.carbon.2007.03.034

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：

A phenomenological approach is proposed to derive plasmon energies for C materials as a function of mass density rho and sp(2) fraction It is shown that the energy of the graphite in-plane (pi and pi + sigma) and out-of-plane plasmons, as well as the energy of the diamond bulk (sigma) plasmon are correctly reproduced by the model. Crucial factors in this respect - and responsible for the deviation from a free electron picture - are the energy of interband transitions associated with plasmon excitation and the screening of pi electrons due to sigma electron polarization. Plasmon energies, derived as a function of rho and f, are discussed. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1410 / 1418

页数：9

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