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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Univ Witwatersrand, Sch Phys, Private Bag 3, ZA-2050 Johannesburg, South AfricaUniv Witwatersrand, Sch Phys, Private Bag 3, ZA-2050 Johannesburg, South Africa
Every, A. G.
Warmbier, R.
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Univ Witwatersrand, Sch Phys, Private Bag 3, ZA-2050 Johannesburg, South AfricaUniv Witwatersrand, Sch Phys, Private Bag 3, ZA-2050 Johannesburg, South Africa
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Univ Witwatersrand, Mat Energy Res Grp, Private Bag 3, ZA-2050 Johannesburg, South AfricaUniv Witwatersrand, Mat Energy Res Grp, Private Bag 3, ZA-2050 Johannesburg, South Africa
Quandt, Alexander
Warmbier, Robert
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机构:Univ Witwatersrand, Mat Energy Res Grp, Private Bag 3, ZA-2050 Johannesburg, South Africa
Warmbier, Robert
2015 17TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON),
2015,