The magnetic field particle-hole excitation spectrum in doped graphene and in a standard two-dimensional electron gas

Details The magnetic field particle-hole excitation spectrum in doped graphene and in a standard two-dimensional electron gas The magnetic field particle-hole excitation spectrum in doped graphene and in a standard two-dimensional electron gas

2009-09-15

arxiv.org/abs/0909.2825v2

Semicond. Sci. Technol. 25, 034005 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Invited review article in Semicond. Sci. Technol.; accepted for publication

Scientific paper

10.1088/0268-1242/25/3/034005

The particle-hole excitation spectrum for doped graphene is calculated from the dynamical polarizability. We study the zero and finite magnetic field cases and compare them to the standard two-dimensional electron gas. The effects of electron-electron interaction are included within the random phase approximation. From the obtained polarizability, we study the screening effects and the collective excitations (plasmon, magneto-excitons, upper-hybrid mode and linear magneto-plasmons). We stress the differences with the usual 2DEG.

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