Plasmons and the spectral function of graphene

被引：235
|
作者：
Polini, Marco [1 ,2 ]
Asgari, Reza [3 ]
Borghi, Giovanni [1 ,2 ]
Barlas, Yafis [4 ]
Pereg-Barnea, T. [4 ]
MacDonald, A. H. [4 ]
机构：
[1] NEST CNR INFM, I-56126 Pisa, Italy
[2] Scuola Normale Super Pisa, I-56126 Pisa, Italy
[3] Sch Phys, Inst Studies Theoret Phys & Math, Tehran 193955531, Iran
[4] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 08期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.77.081411
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report a theoretical study of the influence of electron-electron interactions on the one-particle Green's function of a doped graphene sheet based on the random-phase approximation and on graphene's massless Dirac equation continuum model. We find that states near the Dirac point interact strongly with plasmons with a characteristic frequency omega(star)(pl) that scales with the sheet's Fermi energy and depends on its interaction coupling constant alpha(gr), partially explaining prominent features of recent angle-resolved photoemission spectroscopy data.
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页数：4
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