Dielectric function, screening, and plasmons in 2D graphene

Details Dielectric function, screening, and plasmons in 2D graphene Dielectric function, screening, and plasmons in 2D graphene

2006-10-20

arxiv.org/abs/cond-mat/0610561v3

Phys. Rev. B 75, 205418 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures

Scientific paper

10.1103/PhysRevB.75.205418

The dynamical dielectric function of two dimensional graphene at arbitrary wave vector $q$ and frequency $\omega$, $\epsilon(q,\omega)$, is calculated in the self-consistent field approximation. The results are used to find the dispersion of the plasmon mode and the electrostatic screening of the Coulomb interaction in 2D graphene layer within the random phase approximation. At long wavelengths ($q\to 0$) the plasmon dispersion shows the local classical behavior $\omega_{cl} = \omega_0 \sqrt{q}$, but the density dependence of the plasma frequency ($\omega_0 \propto n^{1/4}$) is different from the usual 2D electron system ($\omega_0 \propto n^{1/2}$). The wave vector dependent plasmon dispersion and the static screening function show very different behavior than the usual 2D case.

Affiliated with

Also associated with

No associations

Rating

Dielectric function, screening, and plasmons in 2D graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dielectric function, screening, and plasmons in 2D graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dielectric function, screening, and plasmons in 2D graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-361598